Business Days Calculator

Business day: what goes in and what stays out

In everyday language a business day is an ordinary working day: Monday to Friday, minus holidays. Saturdays and Sundays are out, and so is a holiday that falls on a weekday. The arithmetic looks simple, but each context changes a detail: banks use their own banking business days, labor law treats Saturday specially for the weekly rest (Lei 605/1949), and Brazil's Code of Civil Procedure, article 219, counts procedural deadlines in business days only. That is why this tool lets you pick the work week (Monday to Friday, Monday to Saturday or individual days) and the holidays that apply to you. National holidays are calculated, not typed in. The fixed ones are January 1, April 21 (Tiradentes), May 1, September 7, October 12, November 2, November 15, December 25 and, since 2024 (Lei 14.759/2023), November 20, Black Awareness Day. The movable ones depend on Easter, computed with the Meeus/Butcher algorithm: Good Friday falls 2 days before Easter and is a national holiday. Carnival (Tuesday, 47 days before Easter) and Corpus Christi (60 days after) are optional days off, and Ash Wednesday usually has offices opening at 2 pm. Each one can be switched on or off. In the "between dates" mode you choose whether the first and last days count. Spreadsheets (NETWORKDAYS) count both; legal deadlines, as a rule, exclude the starting day and include the due day (CPC, art. 224). In the "add" mode the start date never counts: business day 1 is the first one after it. The result lists the holidays that fell on working days and were removed, so you can check each one. For 2026, with national holidays, the year has 252 business days (261 weekdays minus 9 holidays that fall on weekdays). If you also treat Carnival Monday and Tuesday, Ash Wednesday and Corpus Christi as days off, the total drops to 248. The "year calendar" mode shows the month-by-month table, the nth business day of each month (widely used for the 5th business day of salary and bill payments) and a clickable calendar. State holidays are included only when state law fixes the date. City holidays vary from town to town and are not guessed: add yours, with yearly repetition, and they stay saved in this browser and in the shareable link. For court or contract deadlines, always check the court's or the contract's own calendar.

From period to result in three steps

1. Pick the mode (between dates, add business days or year calendar) and enter the dates or the year.
2. In "Work week and holidays", adjust the week, the state, the optional days off and add your city's holidays.
3. Read the result and the list of removed holidays, copy the text or the link and share the same calculation.

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Sources and references for this tool

These references help contextualize formulas, standards, APIs and limitations used on this page. They do not replace professional validation when a result has legal, financial, medical or operational impact.

• Lei 9.093/1995, feriadosPresidência da República, Defines civil and religious holidays, Good Friday and the powers for state and municipal holidays.
• Lei 10.607/2002, feriados nacionaisPresidência da República, List of the fixed national holidays used by the calculator.
• Lei 14.759/2023, Consciência NegraPresidência da República, Makes November 20 a national holiday, effective from 2024.
• CPC, arts. 219 e 224Presidência da República, Deadlines in days counted in business days only and the excluded starting day.
• CLT, art. 459Presidência da República, Payment of monthly salary by the fifth business day of the following month.

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