Good to know
When a target month is shorter, month and year calculations use its final valid day.
How to use this add or subtract days
- Choose a starting date.
- Select add or subtract and enter the amount.
- See the resulting date and weekday.
Related date and time tools
Age CalculatorEnter a birth date to see an exact calendar age and the total time elapsed.Days Between DatesCompare any two dates. The result includes total days, weeks and a calendar breakdown.Business Days CalculatorCount Monday-to-Friday dates in a range, including both selected dates when they are weekdays.