diff --git a/composer.json b/composer.json
index da521855..ebbe92fa 100644
--- a/composer.json
+++ b/composer.json
@@ -9,7 +9,7 @@
     },
     "require": {
         "gettext/gettext": "^4.4",
-        "twig/twig": "^2.4",
+        "twig/twig": "^2.9",
         "twig/extensions": "^1.5",
         "geoip/geoip": "^1.16",
         "mrclay/minify": "^3.0",
diff --git a/composer.lock b/composer.lock
index 518078a8..a661a191 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "024e398738753e998a1e2b62235843a3",
+    "content-hash": "cd1eb38aad1ab9b78eddde4761daa8b6",
     "packages": [
         {
             "name": "awsumchan/ip",
diff --git a/inc/config.php b/inc/config.php
index 69c22186..8f902c44 100644
--- a/inc/config.php
+++ b/inc/config.php
@@ -875,7 +875,7 @@
 	// Timezone to use for displaying dates/tiems.
 	$config['timezone'] = 'America/Los_Angeles';
 	// The format string passed to strftime() for displaying dates.
-	// http://www.php.net/manual/en/function.strftime.php
+	// https://www.php.net/manual/en/function.strftime.php
 	$config['post_date'] = '%m/%d/%y (%a) %H:%M:%S';
 	// Same as above, but used for "you are banned' pages.
 	$config['ban_date'] = '%A %e %B, %Y';
diff --git a/inc/template.php b/inc/template.php
index a46660f0..047888e3 100644
--- a/inc/template.php
+++ b/inc/template.php
@@ -1,7 +1,7 @@
 <?php
 
 /*
- *  Copyright (c) 2010-2018 Tinyboard Development Group
+ *  Copyright (c) 2010-2020 Tinyboard Development Group
  */
 
 defined('TINYBOARD') or exit;
@@ -116,13 +116,11 @@ class Twig_Extensions_Extension_Tinyboard extends Twig\Extension\AbstractExtensi
 			new Twig\TwigFilter('truncate_body', 'truncate'),
 			new Twig\TwigFilter('truncate_filename', 'twig_filename_truncate_filter'),
 			new Twig\TwigFilter('extension', 'twig_extension_filter'),
-			new Twig\TwigFilter('sprintf', 'sprintf'),
 			new Twig\TwigFilter('capcode', 'capcode'),
 			new Twig\TwigFilter('remove_modifiers', 'remove_modifiers'),
 			new Twig\TwigFilter('hasPermission', 'twig_hasPermission_filter'),
-			new Twig\TwigFilter('date', 'twig_date_filter'),
+			new Twig\TwigFilter('strftime', 'twig_strftime_filter'),
 			new Twig\TwigFilter('poster_id', 'poster_id'),
-			new Twig\TwigFilter('remove_whitespace', 'twig_remove_whitespace_filter'),
 			new Twig\TwigFilter('ago', 'ago'),
 			new Twig\TwigFilter('until', 'until'),
 			new Twig\TwigFilter('push', 'twig_push_filter'),
@@ -140,8 +138,6 @@ class Twig_Extensions_Extension_Tinyboard extends Twig\Extension\AbstractExtensi
 	{
 		return [
 			new Twig\TwigFunction('time', 'time'),
-			new Twig\TwigFunction('floor', 'floor'),
-			new Twig\TwigFunction('timezone', 'twig_timezone_function'),
 			new Twig\TwigFunction('hiddenInputs', 'hiddenInputs'),
 			new Twig\TwigFunction('hiddenInputsHash', 'hiddenInputsHash'),
 			new Twig\TwigFunction('ratio', 'twig_ratio_function'),
@@ -162,20 +158,12 @@ class Twig_Extensions_Extension_Tinyboard extends Twig\Extension\AbstractExtensi
 	}
 }
 
-function twig_timezone_function() {
-	return 'Z';
-}
-
 function twig_push_filter($array, $value) {
 	array_push($array, $value);
 	return $array;
 }
 
-function twig_remove_whitespace_filter($data) {
-	return preg_replace('/[\t\r\n]/', '', $data);
-}
-
-function twig_date_filter($date, $format) {
+function twig_strftime_filter($date, $format) {
 	return gmstrftime($format, $date);
 }
 
@@ -190,10 +178,6 @@ function twig_extension_filter($value, $case_insensitive = true) {
 	return $ext;
 }
 
-function twig_sprintf_filter( $value, $var) {
-	return sprintf($value, $var);
-}
-
 function twig_truncate_filter($value, $length = 30, $preserve = false, $separator = '…') {
 	if (mb_strlen($value) > $length) {
 		if ($preserve) {
diff --git a/templates/banned.html b/templates/banned.html
index 0444d1f1..e507e676 100644
--- a/templates/banned.html
+++ b/templates/banned.html
@@ -1,4 +1,4 @@
-{% filter remove_whitespace %}
+{% apply spaceless %}
 {# Automatically removes unnecessary whitespace #}
 <div class="ban">
 	{% if ban.expires and time() >= ban.expires %}
@@ -13,7 +13,7 @@
 			{% trans %}You have been banned from{% endtrans %}
 		{% endif %}
 			{% if ban.board %}
-				 <strong>{{ config.board_abbreviation|sprintf(ban.board) }}</strong>
+				 <strong>{{ config.board_abbreviation|format(ban.board) }}</strong>
 			{% else %}
 				 {% trans %}all boards{% endtrans %}
 			{% endif %}
@@ -30,7 +30,7 @@
 	{% endif %}
 	<p>
 		{% trans %}Your ban was filed on{% endtrans %} 
-			<strong>{{ ban.created|date(config.ban_date) }}</strong> 
+			<strong>{{ ban.created|strftime(config.ban_date) }}</strong> 
 			{% if config.show_modname %}
 				{% if ban.username %}
 					{% trans %}by{% endtrans %} <strong> {{ ban.username }} </strong>
@@ -44,7 +44,7 @@
 		{% elseif ban.expires %}
 			{% trans %}expires{% endtrans %} <span id="countdown">{{ ban.expires|until }}</span> {% trans %}from now, which is on{% endtrans %} 
 			<strong>
-				{{ ban.expires|date(config.ban_date) }}
+				{{ ban.expires|strftime(config.ban_date) }}
 			</strong>
 			<script>
 				var secondsLeft = {{ ban.expires - time() }};
@@ -101,13 +101,13 @@
 		{% if pending_appeal %}
 			<p>
 				{% trans %}You submitted an appeal for this ban on{% endtrans %} 
-				<strong>{{ pending_appeal|date(config.ban_date) }}</strong>. {% trans %}It is still pending{% endtrans %}.
+				<strong>{{ pending_appeal|strftime(config.ban_date) }}</strong>. {% trans %}It is still pending{% endtrans %}.
 			</p>
 		{% elseif denied_appeals|length >= config.ban_appeals_max %}
 			{% if denied_appeals|length == 1 %}
 				<p>
 					{% trans %}You appealed this ban on{% endtrans %} 
-					<strong>{{ denied_appeals[0]|date(config.ban_date) }}</strong> 
+					<strong>{{ denied_appeals[0]|strftime(config.ban_date) }}</strong> 
 					{% trans %}and it was denied. You may not appeal this ban again.{% endtrans %}
 				</p>
 			{% else %}
@@ -118,14 +118,14 @@
 				{% if denied_appeals|length == 1 %}
 					<p>
 						{% trans %}You appealed this ban on{% endtrans %} 
-						<strong>{{ denied_appeals[0]|date(config.ban_date) }}</strong> 
+						<strong>{{ denied_appeals[0]|strftime(config.ban_date) }}</strong> 
 						{% trans %}and it was denied.{% endtrans %}
 					</p>
 					<p>{% trans %}You may appeal this ban again. Please enter your reasoning below.{% endtrans %}</p>
 				{% else %}
 					<p>
 						{% trans %}You last appealed this ban on{% endtrans %} 
-						<strong>{{ denied_appeals[denied_appeals|length - 1]|date(config.ban_date) }}</strong> 
+						<strong>{{ denied_appeals[denied_appeals|length - 1]|strftime(config.ban_date) }}</strong> 
 						{% trans %}and it was denied.{% endtrans %}
 					</p>
 					<p>{% trans %}You may appeal this ban again. Please enter your reasoning below.{% endtrans %}</p>
@@ -141,4 +141,4 @@
 		{% endif %}
 	{% endif %}
 </div>
-{% endfilter %}
+{% endapply %}
diff --git a/templates/mod/ban_appeals.html b/templates/mod/ban_appeals.html
index 4801e21e..977204eb 100644
--- a/templates/mod/ban_appeals.html
+++ b/templates/mod/ban_appeals.html
@@ -33,7 +33,7 @@
 			<th>{% trans 'Board' %}</th>
 			<td>
 				{% if ban.board %}
-					{{ config.board_abbreviation|sprintf(ban.board) }}
+					{{ config.board_abbreviation|format(ban.board) }}
 				{% else %}
 					<em>{% trans 'all boards' %}</em>
 				{% endif %}
@@ -41,13 +41,13 @@
 		</tr>
 		<tr>
 			<th>{% trans 'Set' %}</th>
-			<td>{{ ban.created|date(config.post_date) }}</td>
+			<td>{{ ban.created|strftime(config.post_date) }}</td>
 		</tr>
 		<tr>
 			<th>{% trans 'Expires' %}</th>
 			<td>
 				{% if ban.expires %}
-					{{ ban.expires|date(config.post_date) }}
+					{{ ban.expires|strftime(config.post_date) }}
 				{% else %}
 					<em>{% trans 'never' %}</em>
 				{% endif %}
@@ -78,7 +78,7 @@
 	<table style="margin: 10px 0">
 		<tr>
 			<th>{% trans 'Appeal time' %}</th>
-			<td>{{ ban.time|date(config.post_date) }}</td>
+			<td>{{ ban.time|strftime(config.post_date) }}</td>
 		</tr>
 		<tr>
 			<th>{% trans 'Appeal reason' %}</th>
diff --git a/templates/mod/ban_form.html b/templates/mod/ban_form.html
index 420b2cc5..64479523 100644
--- a/templates/mod/ban_form.html
+++ b/templates/mod/ban_form.html
@@ -76,7 +76,7 @@
 						<li>
 							<input type="radio" name="board" value="{{ board.uri }}" id="ban-board-{{ board.uri }}"> 
 							<label style="display:inline" for="ban-board-{{ board.uri }}">
-								{{ config.board_abbreviation|sprintf(board.uri) }} - {{ board.title|e }}
+								{{ config.board_abbreviation|format(board.uri) }} - {{ board.title|e }}
 							</label>
 						</li>
 					{% endfor %}
diff --git a/templates/mod/ban_list.html b/templates/mod/ban_list.html
index fc679daa..acbdc221 100644
--- a/templates/mod/ban_list.html
+++ b/templates/mod/ban_list.html
@@ -36,13 +36,13 @@
 						</td>
 						<td  style="white-space: nowrap">
 							{% if ban.board %}
-								{{ config.board_abbreviation|sprintf(ban.board) }}
+								{{ config.board_abbreviation|format(ban.board) }}
 							{% else %}
 								<em>{% trans 'all boards' %}</em>
 							{% endif %}
 						</td>
 						<td style="white-space: nowrap" data-sort-value="{{ ban.created }}">
-							<span title="{{ ban.created|date(config.post_date) }}">
+							<span title="{{ ban.created|strftime(config.post_date) }}">
 								{{ ban.created|ago }} ago
 							</span>
 						</td>
@@ -56,7 +56,7 @@
 								{{ (ban.expires - ban.created + time())|until }}
 							</td>
 							<td style="white-space: nowrap" data-sort-value="{{ ban.expires }}">
-								{{ ban.expires|date(config.post_date) }} 
+								{{ ban.expires|strftime(config.post_date) }} 
 								{% if ban.expires > time() %}
 									<small>(in {{ ban.expires|until }})</small>
 								{% endif %}
diff --git a/templates/mod/board.html b/templates/mod/board.html
index 4da597a7..02908ac3 100644
--- a/templates/mod/board.html
+++ b/templates/mod/board.html
@@ -11,7 +11,7 @@
 			<th>{% trans 'URI' %}</th>
 			<td>
 				{% if not new %}
-					{{ config.board_abbreviation|sprintf(board.uri) }}
+					{{ config.board_abbreviation|format(board.uri) }}
 				{% else %}
 					/<input size="10" maxlength="255" type="text" name="uri" autocomplete="off">/
 				{% endif %}
diff --git a/templates/mod/config-editor-php.html b/templates/mod/config-editor-php.html
index 102b0680..202d303d 100644
--- a/templates/mod/config-editor-php.html
+++ b/templates/mod/config-editor-php.html
@@ -9,7 +9,7 @@
 			{% endif %}
 			{% for _board in boards if _board.uri != board %}
 				<li>
-					<a href="?/config/{{ _board.uri }}">Edit config for {{ config.board_abbreviation|sprintf(_board.uri) }}</a>
+					<a href="?/config/{{ _board.uri }}">Edit config for {{ config.board_abbreviation|format(_board.uri) }}</a>
 				</li>
 			{% endfor %}
 		</ul>
diff --git a/templates/mod/config-editor.html b/templates/mod/config-editor.html
index 25e07dda..f7e30055 100644
--- a/templates/mod/config-editor.html
+++ b/templates/mod/config-editor.html
@@ -8,7 +8,7 @@
 		{% endif %}
 		{% for _board in boards if _board.uri != board %}
 			<li>
-				<a href="?/config/{{ _board.uri }}">Edit config for {{ config.board_abbreviation|sprintf(_board.uri) }}</a>
+				<a href="?/config/{{ _board.uri }}">Edit config for {{ config.board_abbreviation|format(_board.uri) }}</a>
 			</li>
 		{% endfor %}
 	</ul>
diff --git a/templates/mod/dashboard.html b/templates/mod/dashboard.html
index f00beaf7..85c965af 100644
--- a/templates/mod/dashboard.html
+++ b/templates/mod/dashboard.html
@@ -4,7 +4,7 @@
 	<ul>
 		{% for board in boards %}
 			<li>
-				<a href="?/{{ config.board_path|sprintf(board.uri) }}{{ config.file_index }}">{{ config.board_abbreviation|sprintf(board.uri) }}</a>
+				<a href="?/{{ config.board_path|format(board.uri) }}{{ config.file_index }}">{{ config.board_abbreviation|format(board.uri) }}</a>
 					 - 
 				{{ board.title|e }}
 				{% if board.subtitle %}
@@ -56,7 +56,7 @@
 										<em>deleted?</em>
 									{% endif %} 
 									at 
-									{{ post.time|date(config.post_date) }} 
+									{{ post.time|strftime(config.post_date) }} 
 								</small>
 							</li>
 						{% endfor %}
diff --git a/templates/mod/debug/antispam.html b/templates/mod/debug/antispam.html
index 9979a093..e47acdb5 100644
--- a/templates/mod/debug/antispam.html
+++ b/templates/mod/debug/antispam.html
@@ -12,7 +12,7 @@
 	</tr>
 	{% for hash in recent %}
 		<tr>
-			<td>{{ config.board_abbreviation|sprintf(hash.board) }}</td>
+			<td>{{ config.board_abbreviation|format(hash.board) }}</td>
 			<td>
 				{% if hash.thread > 0 %}
 					{{ hash.thread }}
@@ -26,11 +26,11 @@
 				<small><code>{{ hash.hash }}</code></small>
 			</td>
 			<td>
-				<span title="{{ hash.created|date(config.post_date) }}">{{ hash.created|ago }} ago</span>
+				<span title="{{ hash.created|strftime(config.post_date) }}">{{ hash.created|ago }} ago</span>
 			</td>
 			<td>
 				{% if hash.expires %}
-					<span title="{{ hash.expires|date(config.post_date) }}">
+					<span title="{{ hash.expires|strftime(config.post_date) }}">
 						{% if hash.expires < time() %}
 							{{ hash.expires|ago }} ago
 						{% else %}
@@ -60,7 +60,7 @@
 	</tr>
 	{% for hash in top %}
 		<tr>
-			<td>{{ config.board_abbreviation|sprintf(hash.board) }}</td>
+			<td>{{ config.board_abbreviation|format(hash.board) }}</td>
 			<td>
 				{% if hash.thread > 0 %}
 					{{ hash.thread }}
@@ -74,11 +74,11 @@
 				<small><code>{{ hash.hash }}</code></small>
 			</td>
 			<td>
-				<span title="{{ hash.created|date(config.post_date) }}">{{ hash.created|ago }} ago</span>
+				<span title="{{ hash.created|strftime(config.post_date) }}">{{ hash.created|ago }} ago</span>
 			</td>
 			<td>
 				{% if hash.expires %}
-					<span title="{{ hash.expires|date(config.post_date) }}">
+					<span title="{{ hash.expires|strftime(config.post_date) }}">
 						{% if hash.expires < time() %}
 							{{ hash.expires|ago }} ago
 						{% else %}
diff --git a/templates/mod/debug/recent_posts.html b/templates/mod/debug/recent_posts.html
index 406d8812..fc8a84e7 100644
--- a/templates/mod/debug/recent_posts.html
+++ b/templates/mod/debug/recent_posts.html
@@ -16,8 +16,8 @@
 				<small>{{ post.time | ago }} ago</small>
 			</td>
 			<td class="minimal">
-				<a href="?/{{ config.board_path|sprintf(post.board) }}{{ config.file_index }}">
-					{{ config.board_abbreviation|sprintf(post.board) }}
+				<a href="?/{{ config.board_path|format(post.board) }}{{ config.file_index }}">
+					{{ config.board_abbreviation|format(post.board) }}
 				</a>
 			</td>
 			<td><code>{{ post.posthash }}</code></td>
@@ -53,8 +53,8 @@
 				<small>{{ post.time | ago }} ago</small>
 			</td>
 			<td class="minimal">
-				<a href="?/{{ config.board_path|sprintf(post.board) }}{{ config.file_index }}">
-					{{ config.board_abbreviation|sprintf(post.board) }}
+				<a href="?/{{ config.board_path|format(post.board) }}{{ config.file_index }}">
+					{{ config.board_abbreviation|format(post.board) }}
 				</a>
 			</td>
 			<td class="minimal" >
diff --git a/templates/mod/inbox.html b/templates/mod/inbox.html
index db0641e4..6a0701ca 100644
--- a/templates/mod/inbox.html
+++ b/templates/mod/inbox.html
@@ -23,7 +23,7 @@
 					{% endif %}
 				</td>
 				<td class="minimal">
-					{{ message.time|date(config.post_date) }}
+					{{ message.time|strftime(config.post_date) }}
 				</td>
 				<td>
 					<a href="?/PM/{{ message.id }}">
diff --git a/templates/mod/log.html b/templates/mod/log.html
index c16a36a5..fb7b44df 100644
--- a/templates/mod/log.html
+++ b/templates/mod/log.html
@@ -36,11 +36,11 @@
 					{% endif %}
 				</td>
 				<td class="minimal" data-sort-value="{{ log.time }}">
-					<span title="{{ log.time|date(config.post_date) }}">{{ log.time|ago }}</span>
+					<span title="{{ log.time|strftime(config.post_date) }}">{{ log.time|ago }}</span>
 				</td>
 				<td class="minimal">
 					{% if log.board %}
-						<a href="?/{{ config.board_path|sprintf(log.board) }}{{ config.file_index }}">{{ config.board_abbreviation|sprintf(log.board) }}</a>
+						<a href="?/{{ config.board_path|format(log.board) }}{{ config.file_index }}">{{ config.board_abbreviation|format(log.board) }}</a>
 					{% else %}
 						-
 					{% endif %}
diff --git a/templates/mod/move.html b/templates/mod/move.html
index e443437d..f16c3e13 100644
--- a/templates/mod/move.html
+++ b/templates/mod/move.html
@@ -6,7 +6,7 @@
 				{% trans 'Thread ID' %}
 			</th>
 			<td>
-				&gt;&gt;&gt;{{ config.board_abbreviation|sprintf(board) }}{{ post }}
+				&gt;&gt;&gt;{{ config.board_abbreviation|format(board) }}{{ post }}
 			</td>
 		</tr>
 		<tr>
@@ -26,7 +26,7 @@
 						<li>
 							<input type="radio" name="board" value="{{ targetboard.uri }}" id="ban-board-{{ targetboard.uri }}" {% if boards|length == 2 %}checked{% endif %}> 
 							<label style="display:inline" for="ban-board-{{ targetboard.uri }}">
-								{{ config.board_abbreviation|sprintf(targetboard.uri) }} - {{ targetboard.title|e }}
+								{{ config.board_abbreviation|format(targetboard.uri) }} - {{ targetboard.title|e }}
 							</label>
 						</li>
 					{% endfor %}
diff --git a/templates/mod/move_reply.html b/templates/mod/move_reply.html
index 6843f485..e1dc054b 100644
--- a/templates/mod/move_reply.html
+++ b/templates/mod/move_reply.html
@@ -6,7 +6,7 @@
 				{% trans 'Post ID' %}
 			</th>
 			<td>
-				&gt;&gt;&gt;{{ config.board_abbreviation|sprintf(board) }}{{ post }}
+				&gt;&gt;&gt;{{ config.board_abbreviation|format(board) }}{{ post }}
 			</td>
 		</tr>
 		<tr>
@@ -17,7 +17,7 @@
 						<li>
 							<input type="radio" name="board" value="{{ targetboard.uri }}" id="ban-board-{{ targetboard.uri }}" {% if boards|length == 2 %}checked{% endif %}> 
 							<label style="display:inline" for="ban-board-{{ targetboard.uri }}">
-								{{ config.board_abbreviation|sprintf(targetboard.uri) }} - {{ targetboard.title|e }}
+								{{ config.board_abbreviation|format(targetboard.uri) }} - {{ targetboard.title|e }}
 							</label>
 						</li>
 					{% endfor %}
diff --git a/templates/mod/news.html b/templates/mod/news.html
index 5585f601..9c13b212 100644
--- a/templates/mod/news.html
+++ b/templates/mod/news.html
@@ -53,7 +53,7 @@
 				<em>{% trans 'no subject' %}</em>
 			{% endif %} 
 			<small class="unimportant">
-				&mdash; {% trans 'by' %} {{ post.name }} {% trans 'at' %} {{ post.time|date(config.post_date) }} 
+				&mdash; {% trans 'by' %} {{ post.name }} {% trans 'at' %} {{ post.time|strftime(config.post_date) }} 
 			</small>
 		</h2>
 		<p>
diff --git a/templates/mod/noticeboard.html b/templates/mod/noticeboard.html
index 1036b129..c82ac13c 100644
--- a/templates/mod/noticeboard.html
+++ b/templates/mod/noticeboard.html
@@ -48,7 +48,7 @@
 					<em>{% trans 'deleted?' %}</em>
 				{% endif %} 
 				{% trans 'at' %} 
-				{{ post.time|date(config.post_date) }} 
+				{{ post.time|strftime(config.post_date) }} 
 			</small>
 		</h2>
 		<p>
diff --git a/templates/mod/pm.html b/templates/mod/pm.html
index 6ba0c9ba..2420292d 100644
--- a/templates/mod/pm.html
+++ b/templates/mod/pm.html
@@ -20,7 +20,7 @@
 		{% endif %}
 		<tr>
 			<th>{% trans 'Date' %}</th>
-			<td>{{ time|date(config.post_date) }} <small>({{ time|ago }} ago)</small></td>
+			<td>{{ time|strftime(config.post_date) }} <small>({{ time|ago }} ago)</small></td>
 			
 		</tr>
 		<tr>
diff --git a/templates/mod/rebuild.html b/templates/mod/rebuild.html
index 81d1ead3..8f782836 100644
--- a/templates/mod/rebuild.html
+++ b/templates/mod/rebuild.html
@@ -60,7 +60,7 @@
 			<li>
 				<input type="checkbox" name="board_{{ board.uri }}" id="board-{{ board.uri }}" checked> 
 				<label for="board-{{ board.uri }}">
-					{{ config.board_abbreviation|sprintf(board.uri) }} - {{ board.title|e }}
+					{{ config.board_abbreviation|format(board.uri) }} - {{ board.title|e }}
 				</label>
 			</li>
 		{% endfor %}
diff --git a/templates/mod/report.html b/templates/mod/report.html
index b5392d5b..32c93777 100644
--- a/templates/mod/report.html
+++ b/templates/mod/report.html
@@ -1,10 +1,10 @@
 <div class="report">
 	<hr>
-	{% trans 'Board' %}: <a href="?/{{ report.board }}/{{ config.file_index }}">{{ config.board_abbreviation|sprintf(report.board) }}</a>
+	{% trans 'Board' %}: <a href="?/{{ report.board }}/{{ config.file_index }}">{{ config.board_abbreviation|format(report.board) }}</a>
 	<br>
 	{% trans 'Reason' %}: {{ report.reason }}
 	<br>
-	{% trans 'Report date' %}: {{ report.time|date(config.post_date) }}
+	{% trans 'Report date' %}: {{ report.time|strftime(config.post_date) }}
 	<br>
 	{% if mod|hasPermission(config.mod.show_ip, report.board) %}
 		{% trans 'Reported by' %}: <a href="?/IP/{{ report.ip }}">{{ report.ip }}</a>
diff --git a/templates/mod/search_results.html b/templates/mod/search_results.html
index 989b3989..1911994b 100644
--- a/templates/mod/search_results.html
+++ b/templates/mod/search_results.html
@@ -34,7 +34,7 @@
 					{{ note.body }}
 				</td>
 				<td class="minimal">
-					{{ note.time|date(config.post_date) }}
+					{{ note.time|strftime(config.post_date) }}
 				</td>
 			</tr>
 		{% endfor %}
@@ -71,13 +71,13 @@
 				</td>
 				<td  style="white-space: nowrap">
 					{% if ban.board %}
-						{{ config.board_abbreviation|sprintf(ban.board) }}
+						{{ config.board_abbreviation|format(ban.board) }}
 					{% else %}
 						<em>{% trans 'all boards' %}</em>
 					{% endif %}					
 				</td>
 				<td style="white-space: nowrap">
-					<span title="{{ ban.created|date(config.post_date) }}">
+					<span title="{{ ban.created|strftime(config.post_date) }}">
 						{{ ban.created|ago }} ago
 					</span>
 				</td>
@@ -92,7 +92,7 @@
 					{% if ban.expires == 0 %}
 						<em>{% trans 'never' %}</em>
 					{% else %}
-						{{ ban.expires|date(config.post_date) }}
+						{{ ban.expires|strftime(config.post_date) }}
 						{% if ban.expires > time() %}
 							 <small>(in {{ ban.expires|until }})</small>
 						{% endif %}
@@ -151,11 +151,11 @@
 					<a href="?/IP/{{ log.ip }}">{{ log.ip }}</a>
 				</td>
 				<td class="minimal">
-					<span title="{{ log.time|date(config.post_date) }}">{{ log.time|ago }}</span>
+					<span title="{{ log.time|strftime(config.post_date) }}">{{ log.time|ago }}</span>
 				</td>
 				<td class="minimal">
 					{% if log.board %}
-						<a href="?/{{ config.board_path|sprintf(log.board) }}{{ config.file_index }}">{{ config.board_abbreviation|sprintf(log.board) }}</a>
+						<a href="?/{{ config.board_path|format(log.board) }}{{ config.file_index }}">{{ config.board_abbreviation|format(log.board) }}</a>
 					{% else %}
 						-
 					{% endif %}
@@ -187,7 +187,7 @@
 					<small>{{ post.time | ago }} ago</small>
 				</td>
 				<td class="minimal">
-					<a href="?/{{ config.board_path|sprintf(post.board) }}{{ config.file_index }}">{{ config.board_abbreviation|sprintf(post.board) }}</a>
+					<a href="?/{{ config.board_path|format(post.board) }}{{ config.file_index }}">{{ config.board_abbreviation|format(post.board) }}</a>
 				</td>
 				<td class="minimal">
 					{% if post.thread %}
diff --git a/templates/mod/theme_rebuilt.html b/templates/mod/theme_rebuilt.html
index b366e7a6..73158670 100644
--- a/templates/mod/theme_rebuilt.html
+++ b/templates/mod/theme_rebuilt.html
@@ -1,2 +1,2 @@
-<p style="text-align:center">{{ 'Successfully rebuilt the <strong>%s</strong> theme.'|trans|sprintf(theme_name) }}</p>
+<p style="text-align:center">{{ 'Successfully rebuilt the <strong>%s</strong> theme.'|trans|format(theme_name) }}</p>
 <p style="text-align:center"><a href="?/themes">{% trans 'Go back to themes' %}</a>.</p>
diff --git a/templates/mod/user.html b/templates/mod/user.html
index f30f04fe..51b095dd 100644
--- a/templates/mod/user.html
+++ b/templates/mod/user.html
@@ -64,7 +64,7 @@
 								{% endif %}
 								> 
 							<label for="board_{{ board.uri }}">
-								{{ config.board_abbreviation|sprintf(board.uri) }}
+								{{ config.board_abbreviation|format(board.uri) }}
 								 - 
 								{{ board.title|e }}
 							</label>
@@ -101,11 +101,11 @@
 					<a href="?/IP/{{ log.ip }}">{{ log.ip }}</a>
 				</td>
 				<td class="minimal">
-					<span title="{{ log.time|date(config.post_date) }}">{{ log.time|ago }}</span>
+					<span title="{{ log.time|strftime(config.post_date) }}">{{ log.time|ago }}</span>
 				</td>
 				<td class="minimal">
 					{% if log.board %}
-						<a href="?/{{ config.board_path|sprintf(log.board) }}{{ config.file_index }}">{{ config.board_abbreviation|sprintf(log.board) }}</a>
+						<a href="?/{{ config.board_path|format(log.board) }}{{ config.file_index }}">{{ config.board_abbreviation|format(log.board) }}</a>
 					{% else %}
 						-
 					{% endif %}
diff --git a/templates/mod/users.html b/templates/mod/users.html
index 4f02c524..5bd9fed3 100644
--- a/templates/mod/users.html
+++ b/templates/mod/users.html
@@ -31,7 +31,7 @@
 					{% set boards = user.boards|split(',') %}
 					{% set _boards = [] %}
 					{% for board in boards %}
-						{% set _boards = _boards|push(board == '*' ? '*' : config.board_abbreviation|sprintf(board)) %}
+						{% set _boards = _boards|push(board == '*' ? '*' : config.board_abbreviation|format(board)) %}
 					{% endfor %}
 					{% set _boards = _boards|sort %}
 					{{ _boards|join(', ') }}
diff --git a/templates/mod/view_ip.html b/templates/mod/view_ip.html
index ee9eb6dc..900ae6c8 100644
--- a/templates/mod/view_ip.html
+++ b/templates/mod/view_ip.html
@@ -1,8 +1,8 @@
 {% for board_posts in posts %}
 	<fieldset>
 		<legend>
-			<a href="?/{{ config.board_path|sprintf(board_posts.board.uri) }}{{ config.file_index }}">
-				{{ config.board_abbreviation|sprintf(board_posts.board.uri) }}
+			<a href="?/{{ config.board_path|format(board_posts.board.uri) }}{{ config.file_index }}">
+				{{ config.board_abbreviation|format(board_posts.board.uri) }}
 				 - 
 				 {{ board_posts.board.title|e }}
 			</a>
@@ -41,7 +41,7 @@
 							{{ note.body }}
 						</td>
 						<td class="minimal">
-							{{ note.time|date(config.post_date) }}
+							{{ note.time|strftime(config.post_date) }}
 						</td>
 						{% if mod|hasPermission(config.mod.remove_notes) %}
 							<td class="minimal">
@@ -118,7 +118,7 @@
 						<th>{% trans 'Board' %}</th>
 						<td>
 							{% if ban.board %}
-								{{ config.board_abbreviation|sprintf(ban.board) }}
+								{{ config.board_abbreviation|format(ban.board) }}
 							{% else %}
 								<em>{% trans 'all boards' %}</em>
 							{% endif %}
@@ -126,13 +126,13 @@
 					</tr>
 					<tr>
 						<th>{% trans 'Set' %}</th>
-						<td>{{ ban.created|date(config.post_date) }}</td>
+						<td>{{ ban.created|strftime(config.post_date) }}</td>
 					</tr>
 					<tr>
 						<th>{% trans 'Expires' %}</th>
 						<td>
 							{% if ban.expires %}
-								{{ ban.expires|date(config.post_date) }}
+								{{ ban.expires|strftime(config.post_date) }}
 							{% else %}
 								<em>{% trans 'never' %}</em>
 							{% endif %}
@@ -196,11 +196,11 @@
 						{% endif %}
 					</td>
 					<td class="minimal">
-						<span title="{{ log.time|date(config.post_date) }}">{{ log.time|ago }}</span>
+						<span title="{{ log.time|strftime(config.post_date) }}">{{ log.time|ago }}</span>
 					</td>
 					<td class="minimal">
 						{% if log.board %}
-							<a href="?/{{ config.board_path|sprintf(log.board) }}{{ config.file_index }}">{{ config.board_abbreviation|sprintf(log.board) }}</a>
+							<a href="?/{{ config.board_path|format(log.board) }}{{ config.file_index }}">{{ config.board_abbreviation|format(log.board) }}</a>
 						{% else %}
 							-
 						{% endif %}
diff --git a/templates/post/flag.html b/templates/post/flag.html
index 481e40ae..f0b37780 100644
--- a/templates/post/flag.html
+++ b/templates/post/flag.html
@@ -3,7 +3,7 @@
 		{% if config.country_flags_condensed %}
 			 class="flag flag-{{ post.modifiers.flag }}" src="{{ config.image_blank }}"
 		{% else %}
-			 class="flag" src="{{ config.uri_flags|sprintf(post.modifiers.flag) }}"
+			 class="flag" src="{{ config.uri_flags|format(post.modifiers.flag) }}"
 		{% endif %}
 		 style="{% if post.modifiers['flag style'] %}
 				{{ post.modifiers['flag style'] }}
diff --git a/templates/post/image.html b/templates/post/image.html
index 16fe20b6..650f7f3c 100644
--- a/templates/post/image.html
+++ b/templates/post/image.html
@@ -15,9 +15,9 @@
 			 poster="
 				{{ config.root }}
 				{% if config.file_icons[post.filename|extension] %}
-					{{ config.file_thumb|sprintf(config.file_icons[post.filename|extension]) }}
+					{{ config.file_thumb|format(config.file_icons[post.filename|extension]) }}
 				{% else %}
-					{{ config.file_thumb|sprintf(config.file_icons.default) }}
+					{{ config.file_thumb|format(config.file_icons.default) }}
 				{% endif %}
 			"
 			 style="width:{{ post.thumbwidth }}px;height:{{ post.thumbheight }}px"
@@ -29,9 +29,9 @@
 				{% if post.thumb == 'file' %}
 					{{ config.root }}
 					{% if config.file_icons[post.filename|extension] %}
-						{{ config.file_thumb|sprintf(config.file_icons[post.filename|extension]) }}
+						{{ config.file_thumb|format(config.file_icons[post.filename|extension]) }}
 					{% else %}
-						{{ config.file_thumb|sprintf(config.file_icons.default) }}
+						{{ config.file_thumb|format(config.file_icons.default) }}
 					{% endif %}
 				{% elseif post.thumb == 'spoiler' %}
 					{{ config.root }}{{ config.spoiler_image }}
diff --git a/templates/post/time.html b/templates/post/time.html
index e6273f94..b90106b9 100644
--- a/templates/post/time.html
+++ b/templates/post/time.html
@@ -1 +1 @@
- <time datetime="{{ post.time|date('%Y-%m-%dT%H:%M:%S') }}{{ timezone() }}">{{ post.time|date(config.post_date) }}</time>
+ <time datetime="{{ post.time|strftime('%Y-%m-%dT%H:%M:%S') }}Z">{{ post.time|strftime(config.post_date) }}</time>
diff --git a/templates/post_reply.html b/templates/post_reply.html
index 451ff1b9..731299e6 100644
--- a/templates/post_reply.html
+++ b/templates/post_reply.html
@@ -1,4 +1,4 @@
-{% filter remove_whitespace %}
+{% apply spaceless %}
 {# tabs and new lines will be ignored #}
 <div class="post reply" id="reply_{{ post.id }}">
 <p class="intro">
@@ -18,11 +18,11 @@
     {% include 'post/fileinfo.html' %} 
     {% include 'post/post_controls.html' %}
 	<div class="body" {% if post.files|length > 1 %}style="clear:both"{% endif %}>
-		{% endfilter %}{% if index %}{{ post.body|truncate_body(post.link) }}{% else %}{{ post.body }}{% endif %}{% filter remove_whitespace %}
+		{% endapply %}{% if index %}{{ post.body|truncate_body(post.link) }}{% else %}{{ post.body }}{% endif %}{% apply spaceless %}
 		{% if post.modifiers['ban message'] %}
-			{{ config.mod.ban_message|sprintf(post.modifiers['ban message']) }}
+			{{ config.mod.ban_message|format(post.modifiers['ban message']) }}
 		{% endif %}
 	</div>
 </div>
 <br/>
-{% endfilter %}
+{% endapply %}
diff --git a/templates/post_thread.html b/templates/post_thread.html
index 125d5f78..04298fd4 100644
--- a/templates/post_thread.html
+++ b/templates/post_thread.html
@@ -1,4 +1,4 @@
-{% filter remove_whitespace %}
+{% apply spaceless %}
 {# tabs and new lines will be ignored #}
 
 <div class="thread" id="thread_{{ post.id }}" data-board="{{ board.uri }}">
@@ -58,9 +58,9 @@
 	{% include 'post/post_controls.html' %}
 	</p>
 	<div class="body">
-		{% endfilter %}{% if index %}{{ post.body|truncate_body(post.link) }}{% else %}{{ post.body }}{% endif %}{% filter remove_whitespace %}
+		{% endapply %}{% if index %}{{ post.body|truncate_body(post.link) }}{% else %}{{ post.body }}{% endif %}{% apply spaceless %}
 		{% if post.modifiers['ban message'] %}
-			{{ config.mod.ban_message|sprintf(post.modifiers['ban message']) }}
+			{{ config.mod.ban_message|format(post.modifiers['ban message']) }}
 		{% endif %}
 	</div>
 	{% if post.omitted or post.omitted_images %}
@@ -86,7 +86,7 @@
 	{% endif %}
 {% if not index %}
 {% endif %}
-</div>{% endfilter %}
+</div>{% endapply %}
 {% set hr = post.hr %}
 {% for post in post.posts %}
 	{% include 'post_reply.html' %}
diff --git a/templates/post_thread_fileboard.html b/templates/post_thread_fileboard.html
index 1a11ff79..1b71766a 100644
--- a/templates/post_thread_fileboard.html
+++ b/templates/post_thread_fileboard.html
@@ -1,4 +1,4 @@
-{% filter remove_whitespace %}
+{% apply spaceless %}
 {# tabs and new lines will be ignored #}
 
 {# we are intentionally breaking the thread_ID convention: the jses need to handle this case differently #}
@@ -39,4 +39,4 @@
     <a href="{{ post.root }}{{ board.dir }}{{ config.dir.res }}{{ link_for(post) }}">[{% trans %}Reply{% endtrans %}]</a>
 
 </tr>
-{% endfilter %}
+{% endapply %}
diff --git a/templates/themes/awsumchan b/templates/themes/awsumchan
index f94be057..0a0c9102 160000
--- a/templates/themes/awsumchan
+++ b/templates/themes/awsumchan
@@ -1 +1 @@
-Subproject commit f94be057545c43ed673fabc017bcc7f383cf2446
+Subproject commit 0a0c9102709cac4ad1d5e333fcd2355d7488c1b4
diff --git a/templates/themes/basic/index.html b/templates/themes/basic/index.html
index 71784c03..37d750f9 100644
--- a/templates/themes/basic/index.html
+++ b/templates/themes/basic/index.html
@@ -1,4 +1,4 @@
-{% filter remove_whitespace %}
+{% apply spaceless %}
 <!doctype html>
 <html>
 <head>
@@ -29,7 +29,7 @@
 					{% else %}
 						<em>no subject</em>
 					{% endif %}
-					<span class="unimportant"> &mdash; by {{ entry.name }} at {{ entry.time|date(config.post_date, config.timezone) }}</span>
+					<span class="unimportant"> &mdash; by {{ entry.name }} at {{ entry.time|strftime(config.post_date, config.timezone) }}</span>
 				</h2>
 				<p>{{ entry.body }}</p>
 			{% endfor %}
@@ -39,9 +39,9 @@
 	<hr/>
         <footer>
                 <p class="unimportant" style="margin-top:20px;text-align:center;">Powered by Tinyboard {{ config.version }}
-                <br>Tinyboard Copyright &copy; 2010-2018 Tinyboard Development Group    
+                <br>Tinyboard Copyright &copy; 2010-2020 Tinyboard Development Group    
                 <br><a href="https://engine.vichan.net/">vichan</a> Copyright &copy; 2012-2016 vichan-devel</p>
         </footer>
 </body>
 </html>
-{% endfilter %}
+{% endapply %}
diff --git a/templates/themes/catalog/catalog.html b/templates/themes/catalog/catalog.html
index d68a6338..7ef1dd76 100644
--- a/templates/themes/catalog/catalog.html
+++ b/templates/themes/catalog/catalog.html
@@ -1,4 +1,4 @@
-{% filter remove_whitespace %}
+{% apply spaceless %}
 <!doctype html>
 <html lang="{{ config.locale }}">
 <head>
@@ -54,7 +54,7 @@
 								data-name="{{ post.name|e }}"
 								data-muhdifference="{{ post.muhdifference }}"
 								class="{{ post.board }} thread-image"
-								title="{{ post.bump|date('%b %d %H:%M') }}">
+								title="{{ post.bump|strftime('%b %d %H:%M') }}">
 						</a>
 						<div class="replies">
 							<strong>R: {{ post.reply_count }} / I: {{ post.image_count }}{% if post.sticky %} (sticky){% endif %}</strong>
@@ -90,4 +90,4 @@
 	</script>{% endverbatim %}
 </body>
 </html>
-{% endfilter %}
+{% endapply %}
diff --git a/templates/themes/categories/news.html b/templates/themes/categories/news.html
index 32c6c6c9..6a05fb56 100644
--- a/templates/themes/categories/news.html
+++ b/templates/themes/categories/news.html
@@ -1,4 +1,4 @@
-{% filter remove_whitespace %}
+{% apply spaceless %}
 <!doctype html>
 <html>
 <head>
@@ -24,7 +24,7 @@
 					{% else %}
 						<em>{% trans %}no subject{% endtrans %}</em>
 					{% endif %}
-					<span class="unimportant"> &mdash; {% trans %}by{% endtrans %} {{ entry.name }} {% trans %}at{% endtrans %} {{ entry.time|date(config.post_date) }}</span>
+					<span class="unimportant"> &mdash; {% trans %}by{% endtrans %} {{ entry.name }} {% trans %}at{% endtrans %} {{ entry.time|strftime(config.post_date) }}</span>
 				</h2>
 				<p>{{ entry.body }}</p>
 			{% endfor %}
@@ -33,9 +33,9 @@
 	
         <footer>
                 <p class="unimportant" style="margin-top:20px;text-align:center;">Powered by Tinyboard {{ config.version }}
-                <br>Tinyboard Copyright &copy; 2010-2018 Tinyboard Development Group    
+                <br>Tinyboard Copyright &copy; 2010-2020 Tinyboard Development Group    
                 <br><a href="https://engine.vichan.net/">vichan</a> Copyright &copy; 2012-2016 vichan-devel</p>
         </footer>
 </body>
 </html>
-{% endfilter %}
+{% endapply %}
diff --git a/templates/themes/categories/sidebar.html b/templates/themes/categories/sidebar.html
index e386c948..1a35667e 100644
--- a/templates/themes/categories/sidebar.html
+++ b/templates/themes/categories/sidebar.html
@@ -1,4 +1,4 @@
-{% filter remove_whitespace %}
+{% apply spaceless %}
 <!doctype html>
 <html>
 <head>
@@ -51,4 +51,4 @@
 	{% endfor %}
 </body>
 </html>
-{% endfilter %}
+{% endapply %}
diff --git a/templates/themes/frameset/news.html b/templates/themes/frameset/news.html
index 68178aa5..a3d07f5d 100644
--- a/templates/themes/frameset/news.html
+++ b/templates/themes/frameset/news.html
@@ -1,4 +1,4 @@
-{% filter remove_whitespace %}
+{% apply spaceless %}
 <!doctype html>
 <html>
 <head>
@@ -23,7 +23,7 @@
 					{% else %}
 						<em>no subject</em>
 					{% endif %}
-					<span class="unimportant"> &mdash; by {{ entry.name }} at {{ entry.time|date(config.post_date) }}</span>
+					<span class="unimportant"> &mdash; by {{ entry.name }} at {{ entry.time|strftime(config.post_date) }}</span>
 				</h2>
 				<p>{{ entry.body }}</p>
 			{% endfor %}
@@ -32,9 +32,9 @@
 	
         <footer>
                 <p class="unimportant" style="margin-top:20px;text-align:center;">Powered by Tinyboard {{ config.version }}
-                <br>Tinyboard Copyright &copy; 2010-2018 Tinyboard Development Group    
+                <br>Tinyboard Copyright &copy; 2010-2020 Tinyboard Development Group    
                 <br><a href="https://engine.vichan.net/">vichan</a> Copyright &copy; 2012-2016 vichan-devel</p>
         </footer>
 </body>
 </html>
-{% endfilter %}
+{% endapply %}
diff --git a/templates/themes/frameset/sidebar.html b/templates/themes/frameset/sidebar.html
index 40e2d719..1bb81330 100644
--- a/templates/themes/frameset/sidebar.html
+++ b/templates/themes/frameset/sidebar.html
@@ -1,4 +1,4 @@
-{% filter remove_whitespace %}
+{% apply spaceless %}
 <!doctype html>
 <html>
 <head>
@@ -29,7 +29,7 @@
 		<ul>
 			{% for board in boards %}
 				<li>
-					<a href="{{ config.board_path|sprintf(board.uri) }}">
+					<a href="{{ config.board_path|format(board.uri) }}">
 						{{ board.title|e }}
 					</a>
 				</li>
@@ -38,4 +38,4 @@
 	</fieldset>
 </body>
 </html>
-{% endfilter %}
+{% endapply %}
diff --git a/templates/themes/recent/recent.html b/templates/themes/recent/recent.html
index 1a478c4d..cd8ba92d 100644
--- a/templates/themes/recent/recent.html
+++ b/templates/themes/recent/recent.html
@@ -1,4 +1,4 @@
-{% filter remove_whitespace %}
+{% apply spaceless %}
 <!doctype html>
 <html>
 <head>
@@ -57,9 +57,9 @@
 	<hr/>
 	<footer>
 		<p class="unimportant" style="margin-top:20px;text-align:center;">Powered by Tinyboard {{ config.version }}
-		<br>Tinyboard Copyright &copy; 2010-2014 Tinyboard Development Group    
+		<br>Tinyboard Copyright &copy; 2010-2020 Tinyboard Development Group    
 		<br><a href="https://engine.vichan.net/">vichan</a> Copyright &copy; 2012-2016 vichan-devel</p>
 	</footer>
 </body>
 </html>
-{% endfilter %}
+{% endapply %}
diff --git a/templates/themes/rss/rss.xml b/templates/themes/rss/rss.xml
index 30fdb473..c3435d9a 100644
--- a/templates/themes/rss/rss.xml
+++ b/templates/themes/rss/rss.xml
@@ -1,4 +1,4 @@
-{% filter remove_whitespace %}
+{% apply remove_whitespace %}
 <?xml version="1.0" encoding="utf-8"?>
 <rss xmlns:dc="http://purl.org/dc/elements/1.1/"
      version="2.0">
@@ -25,4 +25,4 @@
     {% endfor %}
   </channel>
 </rss>
-{% endfilter %}
+{% endapply %}
diff --git a/templates/themes/sitemap/sitemap.xml b/templates/themes/sitemap/sitemap.xml
index 95dfdd26..22e9a107 100644
--- a/templates/themes/sitemap/sitemap.xml
+++ b/templates/themes/sitemap/sitemap.xml
@@ -1,9 +1,9 @@
-{% filter remove_whitespace %}
+{% apply remove_whitespace %}
 <?xml version="1.0" encoding="UTF-8"?>
 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
 	{% for board in boards %}
 		<url>
-			<loc>{{ settings.url ~ (config.board_path | format(board)) ~ config.file_index }}</loc>
+			<loc>{{ settings.url ~ (config.board_path|format(board)) ~ config.file_index }}</loc>
 		</url>
 	{% endfor %}
 	{% for board, thread_list in threads %}
@@ -16,4 +16,4 @@
 		{% endfor %}
 	{% endfor %}
 </urlset>
-{% endfilter %}
+{% endapply %}