How it works
result = start date ± amountmonths and years follow the calendar
- start date
- the date you begin from
- amount
- how many days, weeks, months or years
- result
- the date you land on
Adding a month to the 31st when the next month is shorter rolls to the end of that month, which is how calendars normally handle it.
Frequently asked questions
How do I add days to a date?
Enter the date, set the amount and pick "days", and the tool shows the resulting date and weekday.
What does adding a month do?
It moves to the same day number in the next month. If that day does not exist, it falls on the last day of the month.
Can I subtract instead of add?
Yes. Switch the direction to "subtract" to move backwards from the date.
Are leap years handled?
Yes. Adding years and months respects leap years automatically.