diff --git a/src/portal/src/app/base/left-side-nav/replication/replication/replication-tasks/replication-tasks.component.html b/src/portal/src/app/base/left-side-nav/replication/replication/replication-tasks/replication-tasks.component.html
index fcc701053..dc0e7cb16 100644
--- a/src/portal/src/app/base/left-side-nav/replication/replication/replication-tasks/replication-tasks.component.html
+++ b/src/portal/src/app/base/left-side-nav/replication/replication/replication-tasks/replication-tasks.component.html
@@ -109,7 +109,7 @@
         <clr-dg-cell>{{t.operation}}</clr-dg-cell>
         <clr-dg-cell>{{getStatusStr(t.status)}}</clr-dg-cell>
         <clr-dg-cell>{{t.start_time | harborDatetime: 'short'}}</clr-dg-cell>
-        <clr-dg-cell>{{t.end_time && t.end_time != '0001-01-01T00:00:00Z' ? (t.end_time | harborDatetime: 'short') : "-"}}</clr-dg-cell>
+        <clr-dg-cell>{{t.end_time  | harborDatetime: 'short'}}</clr-dg-cell>
         <clr-dg-cell>
           <a target="_blank" [href]="viewLog(t.id)" *ngIf="t.status !== 'Initialized'">
             <clr-icon shape="list"></clr-icon>
diff --git a/src/portal/src/app/shared/pipes/harbor-datetime.pipe.ts b/src/portal/src/app/shared/pipes/harbor-datetime.pipe.ts
index 38cfc8a84..a962f23bf 100644
--- a/src/portal/src/app/shared/pipes/harbor-datetime.pipe.ts
+++ b/src/portal/src/app/shared/pipes/harbor-datetime.pipe.ts
@@ -2,18 +2,23 @@ import { Pipe, PipeTransform } from '@angular/core';
 import { DatePipe } from "@angular/common";
 import { DEFAULT_LANG_LOCALSTORAGE_KEY, DeFaultLang } from "../entities/shared.const";
 
+const baseTimeLine: Date = new Date('1970-1-1');
+
 @Pipe({
-  name: 'harborDatetime',
-  pure: false
+    name: 'harborDatetime',
+    pure: false
 })
 export class HarborDatetimePipe implements PipeTransform {
 
-  transform(value: any, format?: string): string {
-    let lang: string = DeFaultLang;
-    if (localStorage && localStorage.getItem(DEFAULT_LANG_LOCALSTORAGE_KEY)) {
-      lang = localStorage.getItem(DEFAULT_LANG_LOCALSTORAGE_KEY);
+    transform(value: any, format?: string): string {
+        let lang: string = DeFaultLang;
+        if (localStorage && localStorage.getItem(DEFAULT_LANG_LOCALSTORAGE_KEY)) {
+            lang = localStorage.getItem(DEFAULT_LANG_LOCALSTORAGE_KEY);
+        }
+        if (value && value <= baseTimeLine) {// invalid date
+            return '-';
+        }
+        // default format medium
+        return new DatePipe(lang).transform(value, format ? format : 'medium');
     }
-    // default format medium
-    return new DatePipe(lang).transform(value, format ? format : 'medium');
-  }
 }