diff --git a/time.php b/time.php
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+++ b/time.php
@@ -0,0 +1,48 @@
+<html>
+<head>
+<title>
+Hey revi, what time is it for you?
+</title>
+<style>
+@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono&family=IBM+Plex+Sans+KR:wght@300;400&family=Noto+Sans+KR&family=Ubuntu+Mono&display=swap');
+
+body {
+	margin: 40px auto;
+	max-width: 650px;
+	line-height: 1.6;
+	font-size: 16px;
+	padding: 0 10px;
+	font-family:
+		'IBM Plex Sans KR',
+		'Noto Sans KR',
+		-apple-system,
+		BlinkMacSystemFont,
+		'Segoe UI',
+		Helvetica,
+		Arial,
+		sans-serif,
+		'Apple Color Emoji',
+		'Segoe UI Emoji';
+}
+</style>
+</head>
+<body>
+<?php
+
+// Create a DateTime object with Asia/Seoul timezone
+$dateTimeSeoul = new DateTime('now', new DateTimeZone('Asia/Seoul'));
+
+// Format date and time in ISO 8601 format
+$date = $dateTimeSeoul->format('Y-m-d');
+$time = $dateTimeSeoul->format('H:i:s');
+
+// Create the Zonestamp link with current epoch time
+$currentEpoch = time();
+$zonestampLink = "https://zonestamp.toolforge.org/{$currentEpoch}";
+
+// Display the message with formatted date, time, and Zonestamp link
+echo "It is {$date} {$time} in <code>Asia/Seoul</code>, where <a rel='me' href='https://revi.xyz'>revi</a> lives.<br />Check in your timezone: <a href='{$zonestampLink}'>ZoneStamp</a>.<br /><hr><a href='https://github.com/revi/sandbox/blob/master/time.php'>Source code @ GitHub</a>. (Warning: it is far from 'clean'.)";
+
+?>
+</body>
+</html>
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