Index: src/wp-admin/includes/template.php
===================================================================
--- src/wp-admin/includes/template.php	(revision 31141)
+++ src/wp-admin/includes/template.php	(working copy)
@@ -763,7 +763,7 @@
 
 	echo '<div class="timestamp-wrap">';
 	/* translators: 1: month, 2: day, 3: year, 4: hour, 5: minute */
-	printf( __( '%1$s %2$s, %3$s @ %4$s : %5$s' ), $month, $day, $year, $hour, $minute );
+	printf( __( '%1$s %2$s, %3$s @ %4$s:%5$s' ), $month, $day, $year, $hour, $minute );
 
 	echo '</div><input type="hidden" id="ss" name="ss" value="' . $ss . '" />';
 
Index: src/wp-admin/js/post.js
===================================================================
--- src/wp-admin/js/post.js	(revision 31141)
+++ src/wp-admin/js/post.js	(working copy)
@@ -676,6 +676,16 @@
 		stamp = $('#timestamp').html();
 		visibility = $('#post-visibility-display').html();
 
+		zeroise = function(number) {
+			var str = number.toString();
+
+			if ( str.length < 2 ) {
+				str = '0' + str;
+			}
+
+			return str;
+		};
+
 		updateVisibility = function() {
 			if ( $postVisibilitySelect.find('input:radio:checked').val() != 'public' ) {
 				$('#sticky').prop('checked', false);
@@ -725,11 +735,11 @@
 			} else {
 				$('#timestamp').html(
 					publishOn + ' <b>' +
-					postL10n.dateFormat.replace( '%1$s', $('option[value="' + $('#mm').val() + '"]', '#mm').text() )
-						.replace( '%2$s', jj )
+					postL10n.dateFormat.replace( '%1$s', $('option[value="' + $('#mm').val() + '"]', '#mm').text().replace(/[\d\-\s]+/, '') )
+						.replace( '%2$s', jj.replace(/^0/, '') )
 						.replace( '%3$s', aa )
 						.replace( '%4$s', hh )
-						.replace( '%5$s', mn ) +
+						.replace( '%5$s', zeroise( mn ) ) +
 						'</b> '
 				);
 			}
Index: src/wp-includes/script-loader.php
===================================================================
--- src/wp-includes/script-loader.php	(revision 31141)
+++ src/wp-includes/script-loader.php	(working copy)
@@ -446,7 +446,7 @@
 			'publishOnFuture' =>  __('Schedule for:'),
 			'publishOnPast' => __('Published on:'),
 			/* translators: 1: month, 2: day, 3: year, 4: hour, 5: minute */
-			'dateFormat' => __('%1$s %2$s, %3$s @ %4$s : %5$s'),
+			'dateFormat' => __('%1$s %2$s, %3$s @ %4$s:%5$s'),
 			'showcomm' => __('Show more comments'),
 			'endcomm' => __('No more comments found.'),
 			'publish' => __('Publish'),