Date calculators, countdowns & calendars
Find a future date, measure the time between two dates, or count U.S. business days that skip weekends and federal holidays. Every answer shows how it was counted.
Quick date calculator
Example: 90 days from today
Friday, January 22, 2027
+90 calendar days (12 weeks + 6 days)
Business days skip weekends and observed U.S. federal holidays.
Tools directory
Six kinds of date calculators
Each tool shows its counting rules: which days are included, how month ends work and which holidays are skipped.
Date calculators
Add or subtract days, weeks and months, or count the days between two dates.
Explore date calculatorsCountdowns
Count down to any date, see how long it has been since a date, or check the days left this year.
Explore countdownsBusiness & working days
Count working days that skip weekends and U.S. federal holidays, between dates or from today.
- Business day calculator
- Business days between dates
- Business days from today
- Working days left this month
- Working days left in 2026
Weeks & calendars
Look up weekdays, ISO week numbers, the day of the year and calendars for any month.
Explore weeks & calendarsAge & birthdays
Work out an exact age from a birthday, or the possible ages for any birth year.
Explore age & birthdaysEvents & holidays
Countdowns to U.S. holidays and observances, with actual dates and federal days off.
- All holiday countdowns
- Federal holidays by year
- 2026 federal holidays
- Days until Christmas
- Days until Thanksgiving
Coming up
Upcoming events & holidays
Countdowns run to the actual holiday date, not the weekday federal offices take off.
The End of Daylight Saving Time
Election Day
Veterans Day
Thanksgiving
Black Friday
How every answer is counted
Counts start the day after the start date and include the end date. Months follow the calendar. Business days skip Saturdays, Sundays and the 11 U.S. federal holidays (5 U.S.C. 6103).