Date Calculations

Date Add Subtract Calculator

Use a date add subtract calculator to move any base date forward or backward by years, months, weeks, and days, then see the resulting calendar date, weekday.

Date Difference Calculator

Count days, weeks, months, business days, and range checkpoints between two dates with inclusive and exclusive comparisons.

Days Until Calculator

Use this days until calculator to count how many days until a future date or since a past date, with holiday shortcuts, inclusive counting.

Month Calculator

Calculate complete calendar months between two dates, with remaining days, total days, end-of-month handling, and month milestone checkpoints.