Date Calculator
Add or subtract days, weeks, months, and years from any date. Calculate the exact duration between dates — total days, calendar-accurate breakdown, weeks, and business days — or find the day of the week for any date.
Tip: click the ▾ in any field for common values — the result updates instantly.
Results
Result Date
Thursday, July 23, 2026
Week 30 of 2026
0
Total Days
0
Weeks
0
Remaining Days
Thursday
Day of Week
How to Use
Add/Subtract Days
Pick a start date, then set years, months, weeks, and days — type a value or click the ▾ in any field for common numbers. The result updates instantly. Enable "Exclude weekends" to step in business days only, optionally skipping US federal holidays.
Date Difference
Pick two dates and the result updates instantly: total days, a calendar-accurate years/months/days breakdown, total weeks, and business days. Toggle "Include end date" to count the last day too, and optionally exclude US federal holidays from business days. Need only the working-day count? The dedicated Business Days Calculator focuses on exactly that.
Weekday & Week Number
Find the day of the week, ISO week number, and other details for any date. Helpful for scheduling and calendar planning.