diff --git a/models/contest.js b/models/contest.js
index 5d9b5b0..1edbbbc 100644
--- a/models/contest.js
+++ b/models/contest.js
@@ -131,7 +131,7 @@ class Contest extends Model {
   }
 
   async isRunning(now) {
-    if (!now) now = syzoj.utils.getCurrentTime();
+    if (!now) now = syzoj.utils.getCurrentDate();
     return now >= this.start_time && now < this.end_time;
   }
 
diff --git a/modules/contest.js b/modules/contest.js
index d54a689..9f72213 100644
--- a/modules/contest.js
+++ b/modules/contest.js
@@ -91,8 +91,8 @@ app.post('/contest/:id/edit', async (req, res) => {
     if (!Array.isArray(req.body.problems)) req.body.problems = [req.body.problems];
     contest.problems = req.body.problems.join('|');
     contest.information = req.body.information;
-    contest.start_time = syzoj.utils.parseTime(req.body.start_time);
-    contest.end_time = syzoj.utils.parseTime(req.body.end_time);
+    contest.start_time = syzoj.utils.parseDate(req.body.start_time);
+    contest.end_time = syzoj.utils.parseDate(req.body.end_time);
 
     await contest.save();
 
@@ -174,6 +174,9 @@ app.get('/contest/:id/ranklist', async (req, res) => {
 
     let ranklist = await players_id.mapAsync(async player_id => {
       let player = await ContestPlayer.fromID(player_id);
+      for (let i in player.score_details) {
+        player.score_details[i].judge_state = await JudgeState.fromID(player.score_details[i].judge_id);
+      }
 
       let user = await User.fromID(player.user_id);
 
diff --git a/modules/discussion.js b/modules/discussion.js
index 3d5ff23..2317cb0 100644
--- a/modules/discussion.js
+++ b/modules/discussion.js
@@ -111,7 +111,7 @@ app.post('/article/:id/edit', async (req, res) => {
     let id = parseInt(req.params.id);
     let article = await Article.fromID(id);
 
-    let time = syzoj.utils.getCurrentTime();
+    let time = syzoj.utils.getCurrentDate();
     if (!article) {
       article = await Article.create();
       article.user_id = res.locals.user.id;
@@ -176,7 +176,7 @@ app.post('/article/:id/comment', async (req, res) => {
       content: req.body.comment,
       article_id: id,
       user_id: res.locals.user.id,
-      public_time: syzoj.utils.getCurrentTime()
+      public_time: syzoj.utils.getCurrentDate()
     });
 
     await comment.save();
diff --git a/utility.js b/utility.js
index feb1789..eacbc10 100644
--- a/utility.js
+++ b/utility.js
@@ -24,6 +24,7 @@ Array.prototype.forEachAsync = Array.prototype.mapAsync = async function (fn) {
 };
 
 let path = require('path');
+let util = require('util');
 let renderer = require('moemark-renderer');
 let moment = require('moment');
 let url = require('url');
@@ -95,10 +96,18 @@ module.exports = {
     m.locale('zh-cn');
     return m.format(format || 'L H:mm:ss');
   },
-  parseTime(s) {
+  formatTime(x) {
+    function toStringWithPad(x) {
+      x = parseInt(x);
+      if (x < 10) return '0' + x.toString();
+      else return x.toString();
+    }
+    return util.format('%s:%s:%s', toStringWithPad(x / 3600), toStringWithPad(x / 60 % 60), toStringWithPad(x % 60));
+  },
+  parseDate(s) {
     return parseInt(+new Date(s) / 1000);
   },
-  getCurrentTime() {
+  getCurrentDate() {
     return parseInt(+new Date / 1000);
   },
   makeUrl(req_params, form) {
diff --git a/views/contest_list.ejs b/views/contest_list.ejs
index ff30a6b..0ffb7f0 100644
--- a/views/contest_list.ejs
+++ b/views/contest_list.ejs
@@ -22,7 +22,7 @@
       <tbody>
         <%
         for (let contest of contests) {
-          let now = syzoj.utils.getCurrentTime();
+          let now = syzoj.utils.getCurrentDate();
           let tag = '';
         %>
         <tr>
diff --git a/views/contest_ranklist.ejs b/views/contest_ranklist.ejs
index d88d804..954eeac 100644
--- a/views/contest_ranklist.ejs
+++ b/views/contest_ranklist.ejs
@@ -1,5 +1,11 @@
 <%= this.title = '排名 - ' + contest.title %>
 <% include header %>
+<style>
+.submit_time {
+  font-size: 0.8em;
+  margin-top: 5px;
+}
+</style>
 <div class="padding">
         <table class="ui very basic center aligned table">
             <thead>
@@ -16,7 +22,7 @@
             </thead>
             <tbody>
             <%
-            let i = 0;
+            let i = 0, latest = contest.start_time;
             for (let item of ranklist) {
               i++
             %>
@@ -45,7 +51,12 @@
                 <span class="score score_<%= parseInt((item.player.score_details[problem.id].score / 10) || 0) %>">
                   <%= item.player.score_details[problem.id].score %>
                 </span>
-                </a></td>
+                </a>
+                <div class="submit_time">
+                  <%= syzoj.utils.formatTime(item.player.score_details[problem.id].judge_state.submit_time - contest.start_time) %>
+                  <% latest = Math.max(latest, item.player.score_details[problem.id].judge_state.submit_time)  %>
+                </div>
+                </td>
                 <% } else { %>
                 <td></td>
                 <% } %>
@@ -54,6 +65,9 @@
                   <span class="score score_<%= parseInt((item.player.score / ranklist[0].player.score * 10) || 0) %>">
                     <%= item.player.score %>
                   </span>
+                  <div class="submit_time">
+                    <%= syzoj.utils.formatTime(latest - contest.start_time) %>
+                  </div>
                 </td>
             </tr>
             <% } %>
diff --git a/views/edit_contest.ejs b/views/edit_contest.ejs
index 164af37..3f2e9cf 100644
--- a/views/edit_contest.ejs
+++ b/views/edit_contest.ejs
@@ -20,11 +20,11 @@
             </div>
             <div class="field">
                 <label>开始时间</label>
-                <input type="text" name="start_time" value="<%= syzoj.utils.formatDate(contest.start_time || syzoj.utils.getCurrentTime()) %>">
+                <input type="text" name="start_time" value="<%= syzoj.utils.formatDate(contest.start_time || syzoj.utils.getCurrentDate()) %>">
             </div>
             <div class="field">
                 <label>结束时间</label>
-                <input type="text" name="end_time" value="<%= syzoj.utils.formatDate(contest.end_time || syzoj.utils.getCurrentTime()) %>">
+                <input type="text" name="end_time" value="<%= syzoj.utils.formatDate(contest.end_time || syzoj.utils.getCurrentDate()) %>">
             </div>
             <button type="submit" class="ui button">提交</button>
         </form>