Server Time · UTC Clock
Millisecond-accurate UTC for drops, ticketing and registration
Sync status
Your device clock
Measuring
Round trip (RTT)
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Estimated error
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This clock does not use your browser's clock. It reads the time from an NTP-synced Cloudflare edge server and keeps the sample with the shortest round trip, so a PC or phone whose own clock is off by several seconds still shows the correct time here.
Using it for drops, ticketing and registration
1. Keep this page open next to the page you are waiting on.
2. Turn on Alarm on the hour and a tone plays at :00 — no need to stare at the screen.
3. Most public servers run on NTP, so their clock matches this one for practical purposes.
4. Click on the mark, not slightly before it. Requests that arrive early are rejected, and the retry costs you more than you saved.
2. Turn on Alarm on the hour and a tone plays at :00 — no need to stare at the screen.
3. Most public servers run on NTP, so their clock matches this one for practical purposes.
4. Click on the mark, not slightly before it. Requests that arrive early are rejected, and the retry costs you more than you saved.
Note: network conditions add tens of milliseconds of error. See Estimated error above.
FAQ
What is server time?
Anything that opens at an exact moment — ticket sales, course registration, limited drops — runs on the server's clock, not yours. If your device clock is a few seconds off, clicking at what looks like the right second is actually early or late.
What does this clock use as its reference?
It reads the time from an NTP-synced Cloudflare edge server and displays it as UTC. Several samples are taken and the one with the shortest round trip is used for the correction.
Can I see my own time zone instead of UTC?
Tick 'My local time' and the clock switches to your device's time zone, with the offset shown underneath. The reference is unchanged — only the display converts.
The alarm is too quiet.
Use the volume slider on this page. It defaults to 80% and the setting is remembered in your browser. The Test button plays the tone at the current level. If it is still quiet, check your device volume and the tab's own volume as well.
How accurate is it?
As accurate as the estimated error shown on the page — usually a few to a few tens of milliseconds on a wired connection, somewhat more on mobile networks. Press Re-sync to measure again.
How do I turn the alarm on?
Tick 'Alarm on the hour' and a tone plays at :00 every hour. Browsers only allow audio to start from a user action, so it has to be ticked again after reloading the page.
Does this work if my computer clock is wrong?
Yes. The displayed time comes from the server, not from your device, so a wrong local clock does not affect it. The page also tells you how far off your device clock is.
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