Date Calculator

Add or subtract years, months, weeks, and days from a starting date.

Calculated date

January 10, 2027

Sunday

Starting dateOctober 12, 2026

OperationAdd

Date offset0y 0mo 0w 90d

Days from starting date90

Day of the weekSunday

About the Date Calculator

Add or subtract years, months, weeks, and days from a starting date.

It runs entirely in your browser — nothing you type is sent to a server — and the result updates as you edit the inputs. Estimates are for educational and informational purposes only; see ourdisclaimer.

Common searches

date math
add days
subtract date

Related calculators

Date Difference CalculatorDays, weeks, and calendar months between any two dates.Day of the Week CalculatorFind a date's weekday, day of year, ISO week, and remaining days in the year.

Browse more inTime & Dates.