diff --git a/phpBB/language/en/acp/board.php b/phpBB/language/en/acp/board.php
index b92710b178..96897af6fd 100644
--- a/phpBB/language/en/acp/board.php
+++ b/phpBB/language/en/acp/board.php
@@ -44,7 +44,7 @@ $lang = array_merge($lang, array(
 	'BOARD_STYLE'					=> 'Board style',
 	'CUSTOM_DATEFORMAT'				=> 'Custom…',
 	'DEFAULT_DATE_FORMAT'			=> 'Date format',
-	'DEFAULT_DATE_FORMAT_EXPLAIN'	=> 'The date format is the same as the PHP <code>date</code> function.',
+	'DEFAULT_DATE_FORMAT_EXPLAIN'	=> 'The date format is the same as the PHP <code><a href="https://secure.php.net/manual/function.date.php">date()</a></code> function.',
 	'DEFAULT_LANGUAGE'				=> 'Default language',
 	'DEFAULT_STYLE'					=> 'Default style',
 	'DEFAULT_STYLE_EXPLAIN'			=> 'The default style for new users.',
diff --git a/phpBB/language/en/ucp.php b/phpBB/language/en/ucp.php
index b82759ae0e..66fb554f78 100644
--- a/phpBB/language/en/ucp.php
+++ b/phpBB/language/en/ucp.php
@@ -116,7 +116,7 @@ $lang = array_merge($lang, array(
 	'BIRTHDAY'					=> 'Birthday',
 	'BIRTHDAY_EXPLAIN'			=> 'Setting a year will list your age when it is your birthday.',
 	'BOARD_DATE_FORMAT'			=> 'My date format',
-	'BOARD_DATE_FORMAT_EXPLAIN'	=> 'The syntax used is identical to the PHP <a href="http://www.php.net/date">date()</a> function.',
+	'BOARD_DATE_FORMAT_EXPLAIN'	=> 'The syntax used is identical to the PHP <a href="https://secure.php.net/manual/function.date.php">date()</a> function.',
 	'BOARD_LANGUAGE'			=> 'My language',
 	'BOARD_STYLE'				=> 'My board style',
 	'BOARD_TIMEZONE'			=> 'My timezone',