Add Days to Date
Move forward or backward from a calendar date by a whole number of days. Handle leap days and month boundaries without time-zone adjustments.
- Add positive day counts
- Subtract with negative counts
- Handle leap-year boundaries
Move a deadline
Choose the starting date and enter a positive number of days. The result is returned in year-month-day format.
Work backwards
Enter -7 to find the date one calendar week before the starting point. Weekend dates remain valid results.
Cross months automatically
January 31 plus one day becomes February 1. You do not need to manually calculate the remaining days in a month.
Respect the supported range
The result must stay within years 0001 through 9999. The offset is limited to one million days in either direction.
Add Days to Date FAQs
It adds every calendar day, including weekends and holidays. Use a business calendar for workday-specific deadlines.
The result is 2024-02-29 because 2024 is a leap year.