Add or subtract days, months, and years from any calendar date.
This calculator is built on deterministic mathematical and algorithmic models. Results are simulations for educational and estimation purposes and should not be used as official or legally binding records.
Calculate days between dates and set live countdown timers for upcoming events.
Calculate exact age, completed age vs age in progress, next birthday day of week, hours and minutes lived.
Calculate calendar days, business days, weekend days, and full year-month-day duration between dates.