Calculator
Enter a starting date and how many days to shift by — forward or backward — and get the resulting date instantly.
This simply shifts the calendar date you enter by the number of days you specify, in whichever direction you pick. It correctly handles month lengths, leap years, and year boundaries — so subtracting 45 days from January 10th correctly lands in November of the previous year.
Looking for the difference between two dates you already have, instead of shifting one by a count? Use the Date Difference Calculator.
Related
Find the gap between two known dates.
Check what weekday your resulting date falls on.
Shift by working days instead of calendar days.