Date calculator
Count the days between dates or find your next milestone.
Between two dates
The same date normally gives 0 days, or 1 day when inclusive. Reverse date order gives a negative result.
Select dates to calculate.
Add or subtract days
The starting date is day 0. One day later is the next date. Enter a nonnegative whole number.
Enter a date and a number of days.
Dates to remember
Only explicitly saved names and dates are stored in this browser, up to 30 entries. Today follows your device’s local date.
Dates are calculated entirely in your browser.
Calculations use Gregorian dates, unaffected by times or daylight saving. Business days and holidays are not distinguished.
How to use the date calculator
Use this tool to check trip lengths, days until an anniversary, or a date a given number of days away.
Select two dates, or enter a starting date and day count. Check whether counting is inclusive, then copy the result.
Example: two days after 2024-02-28 is 2024-03-01 because 2024 is a leap year.
What do the countdown signs mean?
D-3 means 3 days remaining, D+3 means 3 days have passed, and D-DAY is today, based on your device’s local date.
Are weekends and holidays excluded?
No. Every calendar day counts. This is not a business-day calculator. Supported years are 0001–9999.