Add or Subtract Days
Find the date a number of days, weeks or months from another.
Resulting date
Wednesday, April 1, 2026
Day of week
Wednesday
Total days shifted
90
ISO date
2026-04-01
ShowHide the working
- 1Start: Thursday, January 1, 2026
- 2Add 0y 0m 90d
- 3Result: Wednesday, April 1, 2026
Formula
date ± (years, months, days)How it works
Adds or subtracts a span from a date. Months and years are applied by the calendar, so month lengths are handled correctly.
Example
90 days after 1 January 2026 is 1 April 2026.
About the Add or Subtract Days
Find the date a number of days, weeks or months from another. It sits in the Date & Time section of NWS Calc, a free collection of calculators that run entirely in your browser. There is no signup, no paywall and no tracking — open the page, enter your numbers, get an answer.
Frequently asked questions
- Is the Add or Subtract Days free to use?
- Yes. Every calculator on NWS Calc is completely free, with no signup, no usage limits and no ads.
- Does my data leave my device?
- No. The Add or Subtract Days runs entirely in your browser using JavaScript. Nothing you type is uploaded, logged or stored on a server.
- Can I use the Add or Subtract Days on my phone?
- Yes. The page is fully responsive and works in any modern mobile or desktop browser — there is nothing to install.
- What else is in Date & Time?
- Ages, durations, business days, countdowns and time zones. You can browse the full Date & Time category for related calculators.