Madrid · 1–7 January 2026
3 working days
1 and 6 January are holidays; 3–4 January is the weekend.
Free · no sign-up · all Spanish municipalities
Count working days between two dates, add or subtract business days, find the next working day or the last one in a month. Calculations use Spain’s national and regional holidays, plus the local dates currently published for the selected municipality.
2024–2026
8,132
4
Free
Four calculations · one municipality calendar
The municipality index is loaded only when you use a form. No calculation is sent automatically when the page opens.
Both the start and end date are included. Saturdays, Sundays and published holidays for the municipality are excluded.
The starting date is not counted. The result moves only through working days after or before it.
Returns the first working day strictly after or before the selected date.
Starts at the end of the chosen month and skips weekends and published holidays.
Method
For this tool, a working day is a Monday to Friday that is not a published national, regional or local public holiday for the chosen Spanish municipality. “Calendar days” include every date; “weekend days” are Saturdays and Sundays.
The between-dates calculation is inclusive: both dates can count when they are working days. Add/subtract and next/previous calculations do not count the starting date. The result is general calendar arithmetic, not the application of a statutory deadline rule.
Checked examples
3 working days
1 and 6 January are holidays; 3–4 January is the weekend.
7 January 2026
The start is not counted and Epiphany on 6 January is skipped.
24 September 2026
The published local holiday Santa Tecla on 23 September is skipped.
Coverage and sources
National and regional calendars cover all 8,132 municipal records. For 2026, at least one local date is currently published for 7,212 municipalities (88.7%). Where local coverage is incomplete, the calculation can only use the dates already present; the result links back to the municipality calendar so you can inspect its status and sources.
See coverage →Read the methodology →Official-source register →
For developers
Every working-day endpoint is public, free and keyless. Use the visual calculator here; use the API for integrations, batches and reproducible queries.
Questions
Yes for the between-dates mode: each boundary counts if it is a working day. Add/subtract and next/previous begin strictly after or before the starting date.
No. It uses public holidays in Spain for the selected municipality: national, regional and the local dates currently published.
No. Both are excluded before public holidays are applied.
Regional and local public holidays differ by territory. The municipality’s INE code selects the correct published calendar.
Not yet. The interface blocks results outside the published 2024–2026 calendars so it cannot silently return a plausible but incomplete answer.
No. festivos.io preserves official source references, but the tool does not replace the BOE, a regional gazette or professional advice.