Add or subtract days
Find a date by adding or subtracting a whole number of days.
Your dates and times stay in your browser and are not stored.
Method and assumptions
Method version 1.0.0 · Updated
Shift a date
Formula: Start date + number of days
Gregorian civil dates from years 0001 to 9999, without time or timezone. A negative number subtracts days; zero keeps the date. Every day counts, including weekends and holidays. Example: March 1, 2024 − 1 day = February 29, 2024.
- date
- Start date
- days
- Number of days (signed)
Gregorian calendar from years 0001 to 9999. Date, duration and rounding conventions are specified for each mode.