How long until September 21, 2029?

The timer above counts the exact time until September 21, 2029, broken into days, hours, minutes, and seconds, and it ticks live every second. Below it you’ll also find the total in months and weeks, plus a few handy facts about the date — the day of the week it falls on, and whether it’s in a leap year.

It’s measured from your device’s current time to September 21, 2029 in your own local time zone, so the result is right for wherever you are. Because it reads your live clock rather than a saved snapshot, the numbers stay accurate the whole time the page is open.

Yes. Use Share on the countdown to copy a link, or Add to calendar to drop the date into your calendar app. Want your own event with a custom name? Build one on the custom countdown page.

The countdown runs entirely in your browser using your device’s clock and time zone, so there’s no lag from a server and nothing is stored. Daylight-saving changes are handled automatically, which keeps the day and time correct right up to the moment September 21, 2029 arrives.