Countdown Timer

Choose a target date and time in the 'Count down to' picker. The timer immediately shows the days, hours, minutes and seconds remaining and refreshes once per second until the moment arrives.

The date and time you pick are treated as your own local time, and the countdown runs against your device clock, so both sides use the same zone. There is no separate time zone selector.

When the target is reached or passed, every unit drops to zero and the four boxes are replaced by a green 'Time's up' panel that reads 'The target date has arrived.'

It reads your device clock directly and updates every second, so its accuracy is only as good as your system clock. If your computer or phone time is off, the countdown will be off by the same amount.

The remaining time is always recomputed from the current clock rather than counted down manually, so when the page becomes active again it jumps straight to the correct figure instead of lagging behind.

Days can grow large, so it is shown as a plain number. Hours, minutes and seconds are each padded to two digits, so nine seconds reads as 09, which keeps the boxes a steady width.

You can, but there is nothing to count down to. Any target at or before the current moment shows the 'Time's up' message right away rather than negative numbers.

Yes. The tool exposes an endpoint that accepts a target as an ISO 8601 string, such as 2030-01-01T00:00:00Z, and returns the days, hours, minutes, seconds and an isPast flag measured against the server clock.

No. In the browser the countdown runs entirely on your device, so the date you enter never leaves it. Only the optional API request travels over the network.