Add or Subtract Days From a Date
Move a calendar date forward or backward by a whole number of days. Weekends stay in the count. Zero days returns the original date.
Resulting Date
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Day of week:
Original date:
Operation: calendar days
Illustration (not your result): March 1, 2028 plus 30 days is March 31, 2028.
Crossing boundaries
December 31 plus one day is January 1 of the next year. February 28, 2024 plus one day is February 29; February 28, 2025 plus one day is March 1. Results outside January 1, 1900–December 31, 2100 are rejected instead of wrapping.
If you need Monday–Friday only, use the business days calculator. For month lengths that are not a fixed number of days, use months and years.