diff --git a/wire/core/PagesNames.php b/wire/core/PagesNames.php
index 1e377e09..4a005135 100644
--- a/wire/core/PagesNames.php
+++ b/wire/core/PagesNames.php
@@ -319,8 +319,8 @@ class PagesNames extends Wire {
 			$name = wireDate(trim($format));
 			$formatType = 'date';
 
-		} else if(strpos($format, ' ') !== false || strpos($format, '/') !== false) {
-			// date assumed when spaces or slashes present in format
+		} else if(strpos($format, ' ') !== false || strpos($format, '/') !== false || strpos($format, ':') !== false) {
+			// date assumed when spaces, slashes or colon present in format
 			$name = wireDate($format);
 			$formatType = 'date';
 
diff --git a/wire/modules/Process/ProcessPageAdd/ProcessPageAdd.module b/wire/modules/Process/ProcessPageAdd/ProcessPageAdd.module
index 98ef8e86..92bf7b56 100644
--- a/wire/modules/Process/ProcessPageAdd/ProcessPageAdd.module
+++ b/wire/modules/Process/ProcessPageAdd/ProcessPageAdd.module
@@ -1026,7 +1026,7 @@ class ProcessPageAdd extends Process implements ConfigurableModule, WirePageEdit
 		// allow for nameFormat to come from a name_format GET variable
 		$nameFormat = $this->wire('input')->get('name_format');
 		if(strlen($nameFormat)) {
-			$nameFormat = $this->sanitizer->chars($this->sanitizer->text($nameFormat), '-_[alpha][digit]', '-'); 
+			$nameFormat = $this->sanitizer->chars($this->sanitizer->text($nameFormat), '-_:./| [alpha][digit]', '-');
 		} else {
 			if(count($parent->template->childTemplates) > 1) return false;
 			$nameFormat = '';