Pick any future date and time and this timer shows exactly how long is left, broken into days, hours, minutes and seconds, refreshing once a second. The target is read as your local wall-clock time, so a deadline of midnight means midnight where you are, regardless of time zone. When the countdown reaches zero it stops and shows a clear "time's up" message instead of drifting into negative numbers.
Your most recent target is saved in the browser's local storage, so reopening the page restores the countdown without retyping the date. Nothing is sent to a server — the timer is pure client-side JavaScript and keeps running as long as the tab is open. Use it for launches, exams, holidays, or any deadline you want to keep an eye on.