Countdown Calculator
Days remaining until a target date.
Worth Knowing
Counting the days to a future date sounds simple, but it hides decisions: do you count today, the target day, both, or neither? This is the 'fence-post problem' — the days between two dates and the number of days in the span can differ by one depending on whether endpoints are included. This tool counts days remaining until the target. Leap years quietly add a day to any countdown that crosses February 29th, which long-range counts must account for.
How to Use
- Enter Target date into the Countdown Calculator above.
- Your result appears instantly as you type — there's no submit button or page reload.