Lumara Time

Business Days Calculator

Custom work weeks and holiday lists.

  • Free
  • No signup
  • No login

Inputs

What do you want to do?
Working weekdays
Add or subtract (add mode)

Result

How this tool works

Choose a start and end date and decide whether to count the end date. Optionally paste holidays, one YYYY-MM-DD date per line.

The tool counts Monday to Friday, removes listed holidays that fall on weekdays and shows the weekend days separately.

Time-zone rules come from the IANA database in your browser. This server uses database version 2026.5. If governments changed a rule very recently, the two can briefly disagree, so confirm important meetings with participants.

Frequently asked questions

Does it know public holidays?

No. Holidays differ by country and year, so you list the ones that matter to you.

What about a Sunday-to-Thursday week?

Use the Business Days Calculator, which lets you choose the working weekdays.

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