Date Calculator: Add or Subtract
Add or subtract days, business days, weeks, months, or years from any date and get the exact resulting calendar date.
Wednesday, August 26, 2026
ISO date 2026-08-26 · ISO week 35
Month and year arithmetic clamps to the end of the month, so 31 January plus one month is 28 or 29 February. Business days count Monday to Friday and skip weekends; public holidays are not applied because they differ by country.
Cite this page
UnitConvertLab. (2026). Date Calculator: Add or Subtract. UnitConvertLab. Retrieved from https://unitconvertlab.com/tools/date-calculator