Date math
Date Calculator
Add or subtract days/weeks/months from a date, or compute the exact duration between two dates in years, months, and days.
How is this calculated?
Shift: result = base ± (years, months, weeks, days). Duration: end − start, displayed as Y/M/D plus total days/weeks/months.
Notes
- These calculators are for informational purposes only and are not financial, tax, legal, or professional advice. Verify the result with an official source or qualified advisor.