Workdays in Month Calculator: Working Days and Hours in Any Month, with Holidays

How it works

Working days = days in the month − weekend (non-working) days − holidays and days off that fall on working days − extra days off · Working hours = working days × hours per day

The calculator checks each day of the month against your work week (Monday to Friday unless you pick another pattern) and counts the working days. If you choose a holiday calendar, public holidays that land on a working day are subtracted; holidays that fall on a weekend are listed but not subtracted twice. US federal holidays use the official observance rule (a Saturday holiday is observed on Friday, a Sunday one on Monday), UK bank holidays include substitute days, Mexico follows article 74 of the Ley Federal del Trabajo, and Spain uses the national holidays common to the whole country. Under More options you can list your own days off (regional holidays, company closures, a bridge day), subtract a number of vacation days, and set your hours per day to get working hours for payroll or billing. The year table shows the working days, holidays and hours for every month of the year, with an annual total. A month has between 20 and 23 Monday-to-Friday days before holidays, depending on its length and the weekday it starts on.

Worked example

January 2026 has 31 days and starts on a Thursday. It has 4 Saturdays and 5 Sundays, so 31 − 9 = 22 weekdays: 22 working days, or 176 working hours at 8 hours a day. With US federal holidays, New Year’s Day (Thursday, January 1) and Martin Luther King Jr. Day (Monday, January 19) are subtracted: 22 − 2 = 20 working days. With Mexico’s holidays only January 1 falls in the month, giving 21.

Sources: U.S. Office of Personnel Management: Federal holidays (2026–2027 dates and weekend rule) · GOV.UK: Bank holidays in England and Wales (data feed) · Cámara de Diputados: Ley Federal del Trabajo, artículo 74 · El Derecho: Spain 2026 labor calendar (BOE resolution of 17 October 2025)

Frequently asked questions