Date calculator
Add or subtract time from any date
Calculate a future or past date by adding or subtracting days, weeks, months or years. See the resulting weekday, total weeks and business days.
Date calculator
Result
Tuesday, July 14, 2026
Added 30 days to Sunday, June 14, 2026
4 weeks, 2 days (30 total days)
Frequently asked questions
- How do I add days to a date?
- Enter your start date, type the number of days, select "days" as the unit, choose "add", and the calculator shows the resulting date with the day of the week.
- Can I subtract months from a date?
- Yes. Choose "subtract", enter the number, and select "months". The calculator handles month-length differences, including leap years.
- Does the date calculator account for leap years?
- Yes. February 29 is included when adding or subtracting days across a leap year boundary.
- What is the "show business days" option?
- When adding or subtracting days, check this box to also see how many weekdays (Monday–Friday) fall within that range, excluding weekends.
- How is adding weeks different from adding days?
- Adding 2 weeks is the same as adding 14 days. The week option is a convenience shortcut so you don’t have to multiply by 7 yourself.