--- /wordpress/wp-admin/includes/dashboard.php
+++ /wordpress/wp-admin/includes/dashboard.php
@@ -285,12 +285,12 @@
 
 	if ( $show_date ) {
 		if ( !$today )
-			$today = gmdate( get_option( 'date_format' ), time() + get_option( 'gmt_offset' ) );
+			$today = mysql2date( get_option('date_format'), date( "Y-m-d" ) );
 		if ( !$yesterday )
-			$yesterday = gmdate( get_option( 'date_format' ), strtotime( 'yesterday' ) + get_option( 'gmt_offset' ) );
+			$yesterday = mysql2date( get_option('date_format'), date( "Y-m-d", strtotime( '-1 day' ) ) );
 		$wordy_dates = array( $today => __( 'Today' ), $yesterday => __( 'Yesterday' ) );
 	
-		$comment_date = gmdate( get_option( 'date_format' ), strtotime( $comment->comment_date ) + get_option( 'gmt_offset' ) );
+		$comment_date = mysql2date( get_option( 'date_format' ), $comment->comment_date );
 		if ( $comment_date != $date ) {
 			$date = $comment_date;
 			echo '<h4>' . ( isset( $wordy_dates[$date] ) ? $wordy_dates[$date] : $date ) . ":</h4>\n";