How this countdown timer works
A countdown measures the time left between right now and a moment in the future. This tool takes the target date and time you enter, reads them in your device's local time zone, and subtracts the current time from them. The difference is then broken down into whole days, then the remaining hours, minutes and seconds.
The display refreshes every second, so the numbers tick down in real time. Once the target moment passes, the timer stops and shows that your event has arrived. Because the date and name travel in the page's URL, copying the share link lets anyone open the exact same live countdown — nothing is stored on a server.
Each unit rolls over into the next: 60 seconds become a minute, 60 minutes become an hour, and 24 hours become a day. The reference below shows how the units relate.
| Unit | Seconds | Equals |
|---|---|---|
| 1 minute | 60 | 60 seconds |
| 1 hour | 3,600 | 60 minutes |
| 1 day | 86,400 | 24 hours |
| 1 week | 604,800 | 7 days |
Reference note: the countdown uses the Gregorian calendar and your device's local time, so daylight-saving changes between now and the target are handled by your browser's clock.
Frequently asked questions
- How many days until [date]?
- Enter the date in the tool and it shows the number of whole days remaining until it, counted from your device's current local time, alongside a live count of the hours, minutes and seconds.
- How do I make a countdown to share?
- Set the event name and target date, then press Copy share link. The tool builds a link such as
?to=2026-12-31T23:59&name=New%20Yearthat anyone can open to see the same live countdown. - Does the countdown update live?
- Yes. Once a target date is set the timer refreshes every second in your browser, so the days, hours, minutes and seconds tick down in real time without reloading the page.
- What time zone does the countdown use?
- It uses your device's local time zone. The target date and time are read as your local clock, and the remaining time is measured against your device's current local time.
- Can I count down to a time, not just a date?
- Yes. The target field includes both a date and a time, so you can count down to a precise moment such as midnight on New Year's Eve or 3:00 PM on a launch day.
- Is my countdown stored anywhere?
- No — it's in the link and your browser. Nothing is saved on a server; the shareable link carries the date and name as URL parameters.