Add or subtract days, weeks, months, years from any date. Calculate date differences, business days, countdowns, and age calculations.
Remember that February has 29 days in leap years (divisible by 4, except century years unless divisible by 400).
When calculating business days, remember to exclude weekends (Saturday & Sunday) and public holidays.
For international date calculations, always consider time zone differences to avoid off-by-one-day errors.
Months have different lengths: 30 days (Apr, Jun, Sep, Nov), 31 days (Jan, Mar, May, Jul, Aug, Oct, Dec), 28/29 days (Feb).
For historical date calculations, consider calendar changes like the transition from Julian to Gregorian calendar.
For precise age calculations, consider not just years but also months and days for accurate results.
Add or subtract days, weeks, months, and years from any date with precision.
Calculate the exact difference between two dates in days, weeks, months, and years.
Create countdowns to important events with days, hours, minutes, and seconds.
Calculate exact age in years, months, days, and even hours and minutes.
Visual date selection with highlighted today's date and selected dates.
All calculations are done locally in your browser. Your data never leaves your computer.