Time & Date
Days Until Date Calculator
Count how many days remain until a future date, including a countdown in days.
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Formula
Days remaining = target date minus the starting date, in whole days. A negative result means the date has already passed.
How it works
Pick the target date and the date to count from. The calculator subtracts and reports whole days remaining, which also serves as a simple day countdown for deadlines, holidays, and events.
FAQs
Is today counted as day 0 or day 1?
Today is day 0, so a target tomorrow is 1 day away. Add 1 if you prefer an inclusive count.
What if the target date is in the past?
The calculator says how many days ago it was, instead of showing a negative countdown.
Does it account for leap years?
Yes, because it uses real calendar dates.