OnTheSecond

check.onthesecond.com Server Time

This clock is off on purpose

check.onthesecond.com is our accuracy test server. So anyone can check whether a server time measurement is right, we set its clock off standard time on purpose, by a different random amount each day. Today it is +0.845s. A reading close to that means it was measured correctly.

Today’s answer and our results

Click the moment the server clock shows
--:--:--
Checks in the last hour: 0
No math needed.
Is this still right?How do we measure?
    2 msPublic check · 8 min agoGap on a server we set off on purpose
    Server clock now
    --:--:--
    Time left on the server clock
    --
    Add to calendarCalendar
    Measuring… (about 15 seconds)

    When should I click?

    If you wait to see the digits change, your reaction adds about 0.2 s. Turn on the 3-2-1 beeps and click on the rhythm, so your finger lands with the last high beep.
    Clicking too early can get you rejected as “not open yet”. Don’t click before the time above. The time above already allows for how long your click takes to reach the server (measured, at most 0.03 s). It can’t include the queue at the moment of opening, which nobody can measure in advance.

    When exactly should you click for a ticket sale, drop or class registration?

    Time zones

    Time zones only change how times are displayed. How far a server’s clock is off is the same wherever you are. We don’t use your location; we only read your browser’s time zone setting on this device.
    More details

    Measurement history

    Server clocks drift slowly. Right before an opening, servers get busy and measurements get less precise, so we use the most precise reading from the last 15 minutes.

    My device

    How it works: servers stamp each response with the time (to the second). We request it right as the server’s second ticks over, many times, to narrow it down to milliseconds. Standard time comes from the Korea Research Institute of Standards and Science (KRISS) NTP. This measures the web server’s clock, which can differ from internal booking servers.

    check.onthesecond.com server clock record

    check.onthesecond.com’s clock hasn’t been measured yet. Open this page and the first reading appears within about 15 seconds.

    How to read this page

    The big clock is this site’s server clock, corrected for your device. The colored card tells you whether the server is ahead of, behind, or in step with standard time, and by how much.

    How to use

    1. Set the opening date and time (in the site’s local time).
    2. Keep the countdown beeps on. You’ll hear 3·2·1 and a higher tone at the exact moment, even if this tab is in the background.
    3. Click the moment the big clock shows the opening time. If you watch another clock, use the times under “When should I click?”.
    4. Use Add to calendar to get a reminder 5 minutes before, or Copy link to share this exact countdown.

    Tips