specify date format

booking.reports.inc

@@ -775,10 +775,11 @@ function booking_csv_report() {
 
     // Apply data formatting as per https://github.com/mk-j/PHP_XLSXWriter
     if (in_array($key, $datetime_fields)) {
-      $header_array[$key] = 'datetime';
+      // 11/09/2015 22:05
+      $header_array[$key] = 'DD/MM/YYYY HH:MM';
     }
     elseif (in_array($key, $date_fields)) {
-      $header_array[$key] = 'date';    
+      $header_array[$key] = 'DD/MM/YYYY';    
     }
     elseif (in_array($key, $number_only_fields)) {
       $header_array[$key] = 'integer';