Date Calculator

Add or subtract days, weeks, months or years from any date to find the resulting date — useful for deadlines, due dates and planning ahead.

How it works: calendar arithmetic on the Gregorian calendar. Months and years move by calendar month/year, clamping to the last day of the month when the starting day does not exist in the target month (e.g. Jan 31 + 1 month = Feb 28).

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