Add or subtract dates
Move a date by calendar units. Years are applied first, then months, then weeks and days; invalid month-end dates clamp to that month’s final day.
Tuesday, March 3, 2026
Added to Sunday, February 1, 2026.
ISO date2026-03-03
WeekdayTuesday
Absolute day distance30
Month-end clamping happens after years and again after months. For example, subtracting one month from March 31 lands on February 28 or 29.