diff --git a/frontend/src/views/admin/ProjectMembers.vue b/frontend/src/views/admin/ProjectMembers.vue
index a6c46e8f..2261ad0c 100644
--- a/frontend/src/views/admin/ProjectMembers.vue
+++ b/frontend/src/views/admin/ProjectMembers.vue
@@ -30,7 +30,9 @@
             </el-tag>
           </template>
         </el-table-column>
-        <el-table-column prop="added_at" label="加入时间" width="200" />
+        <el-table-column prop="added_at" label="加入时间" width="200">
+          <template #default="scope">{{ displayDateTime(scope.row.added_at) }}</template>
+        </el-table-column>
         <el-table-column label="操作" width="360" fixed="right">
           <template #default="scope">
             <el-select
@@ -104,6 +106,7 @@ import type { Study, StudyMember, UserInfo } from "../../types/api";
 import { useAuthStore } from "../../store/auth";
 import { evaluateAction } from "../../guards/actionGuard";
 import { logAudit } from "../../audit";
+import { displayDateTime } from "../../utils/display";
 
 const route = useRoute();
 const projectId = computed(() => route.params.projectId as string);
diff --git a/frontend/src/views/admin/Projects.vue b/frontend/src/views/admin/Projects.vue
index 39846d14..41226bf9 100644
--- a/frontend/src/views/admin/Projects.vue
+++ b/frontend/src/views/admin/Projects.vue
@@ -25,7 +25,9 @@
             <el-tag :type="statusTag(scope.row.status)">{{ statusLabel(scope.row.status) }}</el-tag>
           </template>
         </el-table-column>
-        <el-table-column prop="created_at" label="创建时间" width="200" />
+        <el-table-column prop="created_at" label="创建时间" width="200">
+          <template #default="scope">{{ displayDateTime(scope.row.created_at) }}</template>
+        </el-table-column>
         <el-table-column label="操作" width="320" fixed="right">
           <template #default="scope">
             <el-button link type="primary" size="small" @click="openEdit(scope.row)">编辑</el-button>
@@ -48,6 +50,7 @@ import { fetchStudies } from "../../api/studies";
 import type { Study } from "../../types/api";
 import ProjectForm from "./ProjectForm.vue";
 import { useStudyStore } from "../../store/study";
+import { displayDateTime } from "../../utils/display";
 
 const projects = ref<Study[]>([]);
 const loading = ref(false);
diff --git a/frontend/src/views/admin/Users.vue b/frontend/src/views/admin/Users.vue
index acc7e421..79378711 100644
--- a/frontend/src/views/admin/Users.vue
+++ b/frontend/src/views/admin/Users.vue
@@ -16,7 +16,9 @@
             <el-tag type="danger" v-else>已禁用</el-tag>
           </template>
         </el-table-column>
-        <el-table-column prop="created_at" label="创建时间" width="200" />
+        <el-table-column prop="created_at" label="创建时间" width="200">
+          <template #default="scope">{{ displayDateTime(scope.row.created_at) }}</template>
+        </el-table-column>
         <el-table-column label="操作" width="320" fixed="right">
           <template #default="scope">
             <el-button link type="primary" size="small" @click="openEdit(scope.row)">编辑</el-button>
@@ -65,6 +67,7 @@ import type { UserInfo } from "../../types/api";
 import UserForm from "./UserForm.vue";
 import UserResetPassword from "./UserResetPassword.vue";
 import { useAuthStore } from "../../store/auth";
+import { displayDateTime } from "../../utils/display";
 
 const users = ref<UserInfo[]>([]);
 const total = ref(0);