diff --git a/db/app_uoj233.sql b/db/app_uoj233.sql
index cfe3c41..f49be87 100644
--- a/db/app_uoj233.sql
+++ b/db/app_uoj233.sql
@@ -813,7 +813,8 @@ CREATE TABLE `user_info` (
   `http_x_forwarded_for` varchar(50) NOT NULL,
   `remember_token` char(60) NOT NULL,
   `motto` varchar(200) NOT NULL,
-  `last_login` datetime NOT NULL,
+  `last_login` timestamp NOT NULL DEFAULT 0,
+  `last_visited` timestamp NOT NULL DEFAULT 0,
   PRIMARY KEY (`username`),
   KEY `ac_num` (`ac_num`,`username`)
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4;
diff --git a/web/app/locale/basic/en.php b/web/app/locale/basic/en.php
index ba94d42..edb6731 100644
--- a/web/app/locale/basic/en.php
+++ b/web/app/locale/basic/en.php
@@ -94,4 +94,7 @@ return [
 	'problem manager' => 'Problem Manager',
 	'contest judger' => 'Contest Judger',
 	'contest only' => 'Contest Only',
+	'last active at' => 'Last active at',
+	'online' => 'Online',
+	'offline' => 'Offline',
 ];
diff --git a/web/app/locale/basic/zh-cn.php b/web/app/locale/basic/zh-cn.php
index 649ec20..85e9fae 100644
--- a/web/app/locale/basic/zh-cn.php
+++ b/web/app/locale/basic/zh-cn.php
@@ -94,4 +94,7 @@ return [
 	'problem manager' => '题目管理者',
 	'contest judger' => '比赛评测员',
 	'contest only' => '仅比赛用户',
+	'online' => '在线',
+	'offline' => '离线',
+	'last active at' => '最后活动于',
 ];
diff --git a/web/app/locale/time/en.php b/web/app/locale/time/en.php
new file mode 100644
index 0000000..35691b0
--- /dev/null
+++ b/web/app/locale/time/en.php
@@ -0,0 +1,26 @@
+<?php
+return [
+	'ago' => 'ago',
+	'left' => 'left',
+	'x years' => function($x) {
+		return $x . ' year' . ($x > 1 ? 's' : '');
+	},
+	'x months' => function($x) {
+		return $x . ' month' . ($x > 1 ? 's' : '');
+	},
+	'x weeks' => function($x) {
+		return $x . ' week' . ($x > 1 ? 's' : '');
+	},
+	'x days' => function($x) {
+		return $x . ' day' . ($x > 1 ? 's' : '');
+	},
+	'x hours' => function($x) {
+		return $x . ' hour' . ($x > 1 ? 's' : '');
+	},
+	'x minutes' => function($x) {
+		return $x . ' minute' . ($x > 1 ? 's' : '');
+	},
+	'x seconds' => function($x) {
+		return $x . ' second' . ($x > 1 ? 's' : '');
+	},
+];
diff --git a/web/app/locale/time/zh-cn.php b/web/app/locale/time/zh-cn.php
new file mode 100644
index 0000000..89ee4cd
--- /dev/null
+++ b/web/app/locale/time/zh-cn.php
@@ -0,0 +1,26 @@
+<?php
+return [
+	'ago' => '前',
+	'left' => '后',
+	'x years' => function($x) {
+		return $x . ' 年';
+	},
+	'x months' => function($x) {
+		return $x . ' 月';
+	},
+	'x weeks' => function($x) {
+		return $x . ' 周';
+	},
+	'x days' => function($x) {
+		return $x . ' 天';
+	},
+	'x hours' => function($x) {
+		return $x . ' 小时';
+	},
+	'x minutes' => function($x) {
+		return $x . ' 分钟';
+	},
+	'x seconds' => function($x) {
+		return $x . '秒';
+	},
+];
diff --git a/web/app/models/UOJLocale.php b/web/app/models/UOJLocale.php
index 119fa13..4c5509f 100644
--- a/web/app/models/UOJLocale.php
+++ b/web/app/models/UOJLocale.php
@@ -2,7 +2,7 @@
 
 class UOJLocale {
 	public static $supported_locales = array('zh-cn', 'en');
-	public static $supported_modules = array('basic', 'contests', 'problems');
+	public static $supported_modules = array('basic', 'contests', 'problems', 'time');
 	public static $data = array();
 	public static $required = array();
 	
diff --git a/web/app/views/user-info.php b/web/app/views/user-info.php
index 9a84368..8ea54c1 100644
--- a/web/app/views/user-info.php
+++ b/web/app/views/user-info.php
@@ -1,3 +1,66 @@
+<?php
+function fTime($time, $gran = -1) {
+	$d[0] = array(1, "seconds");
+	$d[1] = array(60, "minutes");
+	$d[2] = array(3600, "hours");
+	$d[3] = array(86400, "days");
+	$d[4] = array(604800, "weeks");
+	$d[5] = array(2592000, "months");
+	$d[6] = array(31104000, "years");
+
+	$w = array();
+
+	$return = "";
+	$now = time();
+	$diff = $now - $time;
+	$secondsLeft = $diff;
+	$stopat = 0;
+	for ($i = 6; $i > $gran; $i--) {
+		$w[$i] = intval($secondsLeft / $d[$i][0]);
+		$secondsLeft -= ($w[$i] * $d[$i][0]);
+		if ($w[$i] != 0) {
+			$return .= UOJLocale::get('time::x ' . $d[$i][1], abs($w[$i])) . " ";
+			switch ($i) {
+				case 6: // shows years and months
+					if ($stopat == 0) {
+						$stopat = 5;
+					}
+					break;
+				case 5: // shows months and weeks
+					if ($stopat == 0) {
+						$stopat = 4;
+					}
+					break;
+				case 4: // shows weeks and days
+					if ($stopat == 0) {
+						$stopat = 3;
+					}
+					break;
+				case 3: // shows days and hours
+					if ($stopat == 0) {
+						$stopat = 2;
+					}
+					break;
+				case 2: // shows hours and minutes
+					if ($stopat == 0) {
+						$stopat = 1;
+					}
+					break;
+				case 1: // shows minutes and seconds if granularity is not set higher
+					break;
+			}
+			if ($i === $stopat) {
+				break;
+			}
+		}
+	}
+
+	$return .= ($diff > 0) ? UOJLocale::get('time::ago') : UOJLocale::get('time::left');
+
+	return $return;
+}
+?>
+
 <div class="row">
 	<div class="col-md-3">
 		<div class="card">
@@ -73,6 +136,23 @@
 				</li>
 				<?php endif ?>
 			</ul>
+			<div class="card-footer bg-transparent">
+				<?php $last_visited = strtotime($user['last_visited']) ?>
+				<?php if (time() - $last_visited < 60 * 15): // 15 mins ?>
+					<span class="text-success fw-bold">
+						<?= UOJLocale::get('online') ?>
+					</span>
+				<?php elseif ($last_visited > 0): ?>
+					<span class="text-muted">
+						<?= UOJLocale::get('last active at') ?>
+						<?= fTime($last_visited, 0) ?>
+					</span>
+				<?php else: ?>
+					<span class="text-muted">
+						<?= UOJLocale::get('offline') ?>
+					</span>
+				<?php endif ?>
+			</div>
 		</div>
 	</div>
 	<div class="col-md-9 mt-2 mt-md-0">
@@ -107,14 +187,14 @@
 			<div class="card-body">
 <?php
 $_result = DB::query("select date_format(submit_time, '%Y-%m-%d'), problem_id from submissions where submitter = '{$user['username']}' and score = 100 and date(submit_time) between date_sub(curdate(), interval 1 year) and curdate()");
-			$result = [];
-			$vis = [];
-			$cnt = 0;
-			while ($row = DB::fetch($_result)) {
-				$cnt++;
-				$result[$row["date_format(submit_time, '%Y-%m-%d')"]]++;
-			}
-			?>
+$result = [];
+$vis = [];
+$cnt = 0;
+while ($row = DB::fetch($_result)) {
+	$cnt++;
+	$result[$row["date_format(submit_time, '%Y-%m-%d')"]]++;
+}
+?>
 				<h4 class="card-title h5">
 					<?= UOJLocale::get('n accepted in last year', $cnt) ?>
 				</h4>
@@ -169,6 +249,14 @@ $_result = DB::query("select date_format(submit_time, '%Y-%m-%d'), problem_id fr
 						<h5 class="list-group-item-heading">http_x_forwarded_for</h5>
 						<p class="list-group-item-text"><?= $user['http_x_forwarded_for'] ?></p>
 					</li>
+					<li class="list-group-item">
+						<h5 class="list-group-item-heading">last_login</h5>
+						<p class="list-group-item-text"><?= $user['last_login'] ?></p>
+					</li>
+					<li class="list-group-item">
+						<h5 class="list-group-item-heading">last_visited</h5>
+						<p class="list-group-item-text"><?= $user['last_visited'] ?></p>
+					</li>
 				</ul>
 			</div>
 		<?php endif ?>