February 28 2025 Plus 21 Days. The date calculator lets you add or subtract days, weeks, months and years to or from a given date to calculate a past or future date. Date plus or minus date parts (years, months, days, weeks, hours, minutes, seconds), time zone conversion.
This simple date calculator allows you to add/subtract days from a date, or count days between days and after each calculation get the most accurate result. You may enter as many or as few (at least one) time fields as you wish.