DATE CALCULATOR

Add or subtract days, weeks, months, and years from a date to plan schedules, renewals, and deadlines.

Shifted calendar date

Add or subtract date units from a base date

Base date

Days

Weeks

Months

Years

May 15, 2026

WeekdayFriday

ISO weekW20

Day of year135

Specific Tool Notes: Use this calculator when you need a target date after adding or subtracting days, weeks, months, or years from a known starting point.