Date Calculator
Find out how many days are between two dates, or what date lands a number of days before or after a given date. Runs entirely in your browser.
Runs in your browser — nothing is uploaded
Days between two dates
What date is N days before/after a date
Dates are treated as calendar days (no time-of-day), so results won't shift depending on what time you run the calculation.
About this tool
How is "days between" counted?
As whole calendar days between the two dates you pick, ignoring time of day. If you pick the same date twice, the result is 0.
Why show years/months/days as well as total days?
Total days is exact but not always intuitive over long spans. The years/months/days breakdown is calendar-aware — e.g. January 31 to March 1 is "1 month, 1 day," not a rough division of total days by 30.
Does this account for Daylight Saving Time?
Yes. Dates are normalized to midnight UTC before any math happens, so a day is always exactly 24 hours in the calculation — DST transitions can't add or subtract a stray day.
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