Date Calculator
Calculate the number of days between two dates, add or subtract time from a date, and explore detailed information about any date.
How do I calculate the number of days between two dates?
Use the "Days Between" tab above. Enter a start date and end date, and the calculator will instantly show the total days, weeks, months, years, and business days between them.
How do I add days to a date?
Use the "Add/Subtract" tab. Enter your starting date, choose "Add", enter the amount, and select the unit (days, weeks, months, or years). The resulting date is shown instantly.
How are business days calculated?
Business days count only Monday through Friday, excluding Saturdays and Sundays. Public holidays vary by country and are not automatically excluded.
What is a leap year?
A leap year has 366 days (February has 29 days). A year is a leap year if divisible by 4, except century years must be divisible by 400. For example, 2024 is a leap year but 1900 was not.