Move forward or backward from a date while preserving real calendar month lengths.
Result date-
Method
Calendar arithmetic method
Date-only calculations use Gregorian calendar boundaries instead of averaging months into a fixed number of seconds. Month and year additions clamp to the last valid day when necessary.
Business-day results exclude Saturday and Sunday. Public holidays are not excluded because they depend on country, region, employer, and year.
Questions
Date Calculator FAQ
What happens when a target month has fewer days?
The result is clamped to the last valid day of the target month, such as January 31 plus one month becoming the end of February.
Are weeks always seven days?
Yes. This calculator treats each week as exactly seven calendar days.
