Countdown Timer
Pick any future date and watch a live countdown of the days, hours, minutes, and seconds left.
Runs entirely in your browser. Your date is never uploaded anywhere.
How to use this tool
Type an optional name for what you are waiting for, such as a birthday, product launch, or holiday. Choose the target date with the date field and set a time of day, or leave it at midnight. Press Start countdown and the live event countdown begins ticking right away, refreshing every second to show the days, hours, minutes, and seconds left. Use the Next New Year shortcut to jump straight to the start of the upcoming year, and Copy result to grab a plain-text snapshot of how much time remains. The timer keeps running as long as the page is open, so you can leave it on a second screen as a days left tracker.
How it works
The tool reads the current moment from the browser's Date object and subtracts it from your chosen target date and time. The difference comes out in milliseconds, and a setInterval loop recalculates that gap once a second. Each unit is found by dividing the remaining milliseconds by the length of that unit and taking the whole number, then using the remainder for the smaller units below it. Because everything is based on your device's own clock, the custom date countdown stays accurate to the second without contacting any server.
A real example
Suppose today is June 3, 2026 at 2:00 PM and you set the target to December 31, 2026 at 11:59 PM. The gap works out to about 211 days. The timer would show roughly 211 days, 9 hours, 59 minutes, and a steadily falling seconds count. As midnight on New Year's Eve approaches, the days value drops to 0 and the hours, minutes, and seconds tick down to zero, at which point the timer announces that the event has arrived.
Common questions
How do I count the days until a specific date?
Set the target date to the day you care about, leave the time at midnight if the exact hour does not matter, and press Start countdown. The Days box shows the full days until that date, updated live.
What happens when the countdown reaches zero?
Once the target moment passes, the timer stops at zero and the headline changes to say the event has arrived, so you know the moment has come without the numbers going negative.
Which time zone does the timer use?
It uses your device's local time zone for both the current moment and the target you pick, so the live event countdown matches the clock on your own computer or phone.
Does the timer keep running if I switch tabs?
Yes, as long as the page stays open. Some browsers slow background timers to save battery, so the seconds may catch up in a small jump when you return to the tab.
Can I count down to a time later today?
Yes. Pick today's date and a time that is still ahead on the clock, and the days left tracker will show 0 days with the hours, minutes, and seconds remaining.