4 free tools
Date & Time
Date and time calculators for planning. Find your exact age, count the days between two dates, add or subtract days, weeks, or months from a date, and count working days between dates.
- Date & Time
Add or Subtract Calendar Days
Move an ISO date forward or backward by a signed whole-day count. Month and year boundaries…
- Date & Time
Calendar Age
Calculate completed calendar years on an explicit reference date rather than dividing elapsed days by 365.…
- Date & Time
Calendar Day Difference
Find signed elapsed days between two ISO calendar dates. UTC date arithmetic avoids daylight-saving hour shifts.
- Date & Time
Weekday Count
Count Monday-through-Friday dates in a range, including the start and excluding the end. This is a…