diff --git a/frontend/src/ts/ervu/component/grid/StaticColumnInitializer.ts b/frontend/src/ts/ervu/component/grid/StaticColumnInitializer.ts
index fc207a74..3cfe75b2 100644
--- a/frontend/src/ts/ervu/component/grid/StaticColumnInitializer.ts
+++ b/frontend/src/ts/ervu/component/grid/StaticColumnInitializer.ts
@@ -5,7 +5,7 @@ import {
   SuppressKeyboardEventParams
 } from "ag-grid-community";
 import {
-  DateTimeUtil,
+  ComparisonUtils,
   DefaultTooltip,
   GridCellTooltipUtils,
   GridColumnComparatorUtils,
@@ -54,7 +54,12 @@ export class StaticColumnInitializer {
 
       if (type != null) {
         if (gridRef.getRowModelType() == "clientSide") {
-          columnDef.comparator = GridColumnComparatorUtils.columnComparator(type);
+          if (type === 'java.time.ZonedDateTime') {
+            columnDef.comparator = StaticColumnInitializer.zonedDateTimeComparator();
+          }
+          else {
+            columnDef.comparator = GridColumnComparatorUtils.columnComparator(type);
+          }
         }
         columnDef.valueFormatter = GridValueFormatterUtils.columnFormatter(type);
         columnDef.cellRenderer = gridRef.createRenderer(column);
@@ -118,4 +123,13 @@ export class StaticColumnInitializer {
 
     return columnDef;
   }
+
+  private static zonedDateTimeComparator(): (valueA: any, valueB: any) => number {
+    return (valueA: any, valueB: any) => {
+      const format = 'DD.MM.YYYY HH:mm:ss (Z)';
+      const momentA = moment(valueA, format);
+      const momentB = moment(valueB, format);
+      return ComparisonUtils.momentCompare(momentA, momentB);
+    };
+  }
 }