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Subtract Days from a Date

Work backwards from a date by subtracting any number of days, weeks, months or years, and see exactly which earlier calendar date you land on. It answers questions like what date was 90 days ago, when a 30 day notice period must start to hit a target, or the date that was six months before an event. The result includes the day of the week, which helps when you need the previous business day or want to avoid a weekend. Calendar rules are handled for you, so crossing month boundaries and leap years never throws the count off. Enter your reference date and the amounts to remove, and the earlier date appears instantly. All of the calculation happens locally in your browser with nothing sent anywhere.

How to use Subtract Days from Date

  1. Choose your start date.
  2. Enter the amount to subtract and pick the unit.
  3. Read the past date and the weekday it falls on.

Frequently asked questions

Which units can I subtract?

You can subtract days, weeks, months or years, and the tool converts weeks to seven days each while months and years step back on the calendar.

Does it show what weekday the past date was?

Yes. Each result includes the exact day of the week the earlier date falls on.

How does it handle subtracting a month from the 31st?

When the earlier month is shorter, the result lands on the nearest valid day so it never produces an impossible date.

What is Subtract Days from Date?

Work backwards from a date by subtracting any number of days, weeks, months or years, and see exactly which earlier calendar date you land on. It answers questions like what date was 90 days ago, when a 30 day notice period must start to hit a target, or the date that was six months before an event.

Is Subtract Days from Date free to use?

Yes. Subtract Days from Date is completely free, with no sign-up and no usage limits.

Does Subtract Days from Date work in a web browser?

Yes. Subtract Days from Date runs in any modern web browser. There is nothing to download or install.

Is my data private with Subtract Days from Date?

Yes. Subtract Days from Date runs entirely on your device in your browser, so nothing you enter is uploaded to a server.