Countdown Timer
Count down the days, hours, minutes, and seconds to any future date. Also shows time elapsed for past dates.
How It Works
The Countdown Timer shows the live time remaining until any future date and time you choose — or, for past dates, the time elapsed since then. Pick a date and time using the date-time picker, optionally include seconds for precision, and the tool starts a live counter that ticks every second, displaying days, hours, minutes, and seconds remaining alongside the total in each unit (e.g. ‘143 days’ as well as ‘4 months, 21 days’). Past dates flip the display into count-up mode, useful for tracking how long since a milestone. The countdown uses your browser’s local time zone and the JavaScript Date API; nothing is sent to a server, and the page works offline once cached. Common uses include event countdowns (product launches, deadlines, anniversaries), personal challenge timers (30-day habits, sobriety milestones), and quick what-if checks (‘how long until my flight?’). The display refreshes once per second, which is fast enough to feel live without burdening the CPU on background tabs.
Use Cases
- Counting down to a product launch, event, or deadline
- Displaying how long since a milestone date
- Running a personal challenge timer (e.g. 30-day habit)
- Embedding a mental urgency marker for a goal
Frequently Asked Questions
- What time zone is the countdown in?
- Your browser's local time zone, taken from your OS. Set the target date in the same zone unless you explicitly want to count down to a UTC moment.
- Why does the count-up keep going past zero?
- Past dates automatically flip into count-up mode so you can see how long ago an event happened. Pick a future date for a forward countdown.
- Does the timer keep ticking when I switch tabs?
- Yes — but most browsers throttle background tabs to update once per second instead of more frequently, which is fine for a one-second-resolution display.
- Can I share a countdown URL?
- Not directly — the date is stored in the page, not in the URL. To share, take a screenshot or describe the target date.
- Is my target date stored anywhere?
- No. It is held only in the current tab; closing the tab discards it.