How do I calculate working days between dates?

Multiply the total days by 5/7 to estimate business days (excluding weekends). This doesn't account for public holidays, which vary by country. For precise business day calculations, you'd need to factor in your regional holiday calendar.

How many days until a future date?

Set today as the start date and your future date as the end date. The result shows exactly how many days until that date. This works for countdowns to birthdays, holidays, deadlines, and events.

What if the end date is before the start date?

Our calculator returns the absolute difference, so it doesn't matter which date is 'first.' You'll always get a positive number representing the interval between the two dates.

How many days are in a year?

A regular year has 365 days. A leap year has 366 days (adding February 29). Leap years occur every 4 years, except for years divisible by 100 (not leap years) unless also divisible by 400 (are leap years). For example, 2000 was a leap year; 1900 was not.

Days Between Dates Calculator — Date Difference Tool

The Days Between Dates Calculator finds the exact number of days (and weeks, months) between any two dates. Use it to calculate deadlines, project durations, the days until an event, how long ago something happened, or time elapsed between any two milestones. Simply enter a start date and end date — the calculator handles leap years and all calendar irregularities automatically.

Start Year

Start Month

Start Day

End Year

End Month

End Day

Frequently Asked Questions

Yes. JavaScript's Date object handles leap years automatically. February 29 is counted correctly in leap years, so date differences spanning leap years are accurate.

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