Subtract days from date
Subtract days, weeks, months or years from a date
Enter a start date and a number to calculate a past date. See the resulting weekday, weeks and business days.
Date calculator
Result
Friday, May 15, 2026
Subtracted 30 days from Sunday, June 14, 2026
4 weeks, 2 days (30 total days)
Frequently asked questions
- How do I subtract 30 days from a date?
- Enter your start date, type 30, select "days" as the unit, choose "subtract", and the calculator shows the date 30 days earlier.
- What is the difference between subtracting days and subtracting months?
- Subtracting 30 days counts backward 30 calendar days. Subtracting 1 month goes back one calendar month, which may be 28–31 days depending on the month.
- Can I subtract weeks from a date?
- Yes. Select "weeks" as the unit. Subtracting 2 weeks is the same as subtracting 14 days.
- How do I find a date 6 months ago?
- Enter today’s date, type 6, select "months" as the unit, and choose "subtract". The result shows the date 6 months before.