diff --git a/package-lock.json b/package-lock.json
index 3dac0d1..6078c1f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -6576,6 +6576,12 @@
       "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
       "dev": true
     },
+    "xdate": {
+      "version": "0.8.2",
+      "resolved": "https://registry.npmjs.org/xdate/-/xdate-0.8.2.tgz",
+      "integrity": "sha1-17AzwASF0CaVuvAET06s2j/JYaM=",
+      "dev": true
+    },
     "xtend": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
diff --git a/package.json b/package.json
index 3a67e63..b817b0f 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,8 @@
     "style-loader": "^0.19.0",
     "ts-loader": "^3.2.0",
     "typescript": "^2.6.2",
-    "webpack": "^3.10.0"
+    "webpack": "^3.10.0",
+    "xdate": "^0.8.2"
   },
   "dependencies": {
     "koa": "^2.4.1",
diff --git a/src/client/index.ts b/src/client/index.ts
index 5e6a1a0..a142256 100644
--- a/src/client/index.ts
+++ b/src/client/index.ts
@@ -6,7 +6,8 @@ import "jquery"
 (<any>window).Popper = require("popper.js")
 import "bootstrap/dist/js/bootstrap.min.js"
 import "./ctrl-enter.ts"
+(<any>window).XDate = require("xdate")
 
 addEventListener("load", () => {
     riot.mount("app")
-})
\ No newline at end of file
+})
diff --git a/src/client/tags/pages/user-top.tag b/src/client/tags/pages/user-top.tag
index 0f49f56..a83a8c1 100644
--- a/src/client/tags/pages/user-top.tag
+++ b/src/client/tags/pages/user-top.tag
@@ -5,7 +5,7 @@ page-user-top
         .jumbotron(style="text-align: center")
             img(src="{user.avatarUrl}",style="width:8em;height:8em;")
             h1 {user.name}
-            p さんの{user.questionBoxName || "質問箱"} 
+            p さんの{user.questionBoxName || "質問箱"}
                 a(href='{user.avatar || "https://"+user.acct.split("@")[1]+"/@"+user.acct.split("@")[0]}',rel="nofollow") Mastodonのプロフィール
             p {user.description}
             form(action="javascript://",onsubmit="{submit}")
@@ -13,12 +13,12 @@ page-user-top
                 .d-flex.justify-content-end(style="line-height: 2.5em;")
                     span(ref="character_counter",style="padding-right: 1em;") {charcounter}
                     button.btn.btn-primary.col-xs-2(type="submit",disabled="{charcounter < 0}") 質問する
-        h2 回答 
+        h2 回答
             span.badge.badge-pill.badge-secondary(if="{questions.length}",style="font-size: 50%") {questions.length}
         .card.mb-2(each="{question in questions}",if="{question_loaded}")
             .card-body
                 h4.card-title {question.question}
-                h6.card-subtitle.mb-2: a(href="/@{user.acct}/questions/{question._id}").text-muted {question.answeredAt}
+                h6.card-subtitle.mb-2: a(href="/@{user.acct}/questions/{question._id}").text-muted {new XDate(question.answeredAt).toString("yyyy-MM-dd HH:mm:ss")}
                 p.card-text.question-text {question.answer}
         loading(if="{!question_loaded}")
     script.
@@ -49,4 +49,4 @@ page-user-top
                 alert("質問しました!")
                 location.reload()
             })
-        }
\ No newline at end of file
+        }