---
title: "San Sebastián 2026: when and where it's a public holiday — festivos.io"
description: "San Sebastián is a local holiday in 99 municipalities, accounting for 506,179 residents in the 2025 register. In 2026 it falls on 20 January."
source: "https://festivos.io/en/holiday/san-sebastian"
---

# San Sebastián

San Sebastián is a local holiday in 99 municipalities — 506,179 residents in the 2025 register. In 2026 it falls on 20 January; below, where and when it's celebrated.

- **Level:** Local holiday
- **Date 2026:** Tuesday 20 January
- **Municipalities:** 99
- **Residents · 2025 register:** 506,179
- **Where most:** Aragón (30)

## San Sebastián in the working calendar

In 2026, the dataset records San Sebastián as a local holiday in 99 municipalities, accounting for 506,179 residents in the 2025 register. The most common date is 20 January 2026. 8 municipalities set it on another date.

This comparison uses only the official working calendars incorporated into the dataset for each year.

## Demographics of the covered population

Age, citizenship, birthplace and average-age structure from the 2025 Annual Population Census.

| Demographic profile | % |
| --- | --- |
| Women / men | 50.8% / 49.2% |
| Aged 0–14 | 12.9% |
| Aged 15–64 | 64.6% |
| Aged 65+ | 22.5% |
| Foreign citizenship | 13.2% |
| Born outside Spain | 16.8% |
| Weighted mean age | 45.2 years |


### How it differs from its surroundings

Comparison with Spain and with the aggregate of the 12 regions where it is observed. All five comparisons are population-weighted and use only the 2025 Annual Census. A positive sign means the covered population has a higher value than the benchmark.

| Demographic profile | Covered population | Compared with Spain | Compared with its 12 regions |
| --- | --- | --- | --- |
| Aged 0–14 | 12.9% | 0 pp | 0 pp |
| Aged 65+ | 22.5% | +1.8 pp | +1.3 pp |
| Foreign citizenship | 13.2% | -0.9 pp | +0.4 pp |
| Born outside Spain | 16.8% | -2.5 pp | -0.7 pp |
| Weighted mean age | 45.2 years | +0.7 years | +0.4 years |

The largest difference from Spain is in “Born outside Spain”: -2.5 pp.

Sex comes from the 2025 municipal register; all other metrics come from the 2025 Annual Census. Each percentage uses the total from its own statistical operation. [INE municipal tables 68535 and 68541](<https://www.ine.es/dynt3/inebase/index.htm?capsel=11532&padre=11555>).

## Dates of San Sebastián

In 2026 it falls on Tuesday 20 January in most municipalities. 8 move it to another date (when it lands on a weekend or by local agreement).

| Year | Main date | Municipalities |
| --- | --- | --- |
| 2024 | Saturday, 20 January | 31 |
| 2025 | Monday, 20 January | 67 |
| 2026 | Tuesday, 20 January | 99 |

## Official sources

Official documents linked by the 2026 records. Dates can vary by territory; each municipality page preserves its specific source.

Population: official municipal-register figures at 1 January 2025. [INE](<https://www.ine.es/dyngs/INEbase/operacion.htm?c=Estadistica_C&cid=1254736177011&idp=1254734710990>).

[INE municipal tables 68535 and 68541](<https://www.ine.es/dynt3/inebase/index.htm?capsel=11532&padre=11555>).

- [Comunidad de Madrid — Festivos locales (datos abiertos)](<https://datos.comunidad.madrid/dataset/f160eb6c-6715-471e-9bc0-38497aae950f/resource/ba59e7e8-3d8d-4221-a5fa-b5e78b82707f/download/festivos_locales.csv>)
- [Generalitat Valenciana — Resolución de fiestas locales (DOGV)](<https://dogv.gva.es/datos/2025/11/14/pdf/2025_46326_es.pdf>)
- [Gobierno de Aragón — Calendario laboral (Aragón Open Data)](<https://opendata.aragon.es/datos/catalogo/dataset/f861c5f7-5424-4b3c-90bf-a6d2c2f5b0bd/recurso/5ff8c1f8-fb7e-4343-abba-eb7dbd796dbc/descarga/festivos_aragon_2026_completo.csv>)
- [Gobierno de Cantabria — Calendario laboral (BOC)](<https://boc.cantabria.es/boces/verAnuncioAction.do?idAnuBlob=428192>)
- [Gobierno de La Rioja — Calendario de fiestas locales (BOR)](<https://ias1.larioja.org/boletin/Bor_Boletin_visor_Servlet?referencia=36153930-1-PDF-571537>)
- [Gobierno de Navarra — Fiestas locales (datos abiertos)](<https://datosabiertos.navarra.es/es/datastore/dump/f48e36ae-a700-4796-ab37-9ec0a353cfa1?format=csv&bom=True>)
- [Gobierno Vasco — Calendario laboral (Open Data Euskadi)](<https://opendata.euskadi.eus/contenidos/ds_eventos/calendario_laboral_2026/opendata/calendario_laboral_2026.csv>)
- [Junta de Andalucía — Calendario de fiestas locales (datos abiertos)](<https://datos.juntadeandalucia.es/api/v0/work-calendar/all?format=csv>)
- [Junta de Castilla y León — Fiestas locales (datos abiertos)](<https://analisis.datosabiertos.jcyl.es/api/explore/v2.1/catalog/datasets/fiestas-locales-calendario-de-fiestas-de-caracter-local/exports/csv?where=fecha_fiesta%3E%3D%272026-01-01%27+and+fecha_fiesta%3C%3D%272026-12-31%27>)
- [Junta de Comunidades de Castilla-La Mancha — Calendario de fiestas locales (DOCM/datos abiertos)](<https://docm.jccm.es/docm/verArchivoHtml.do?ruta=2025/12/12/html/2025_9468.html&tipo=rutaDocm>)
- [Junta de Extremadura — Resolución de fiestas locales (DOE)](<https://doe.juntaex.es/pdfs/doe/2025/2040o/25063799.pdf>)
- [Xunta de Galicia — Calendario laboral (datos abiertos)](<https://abertos.xunta.gal/es/catalogo/economia-empresa-emprego/-/dataset/0684/calendario-laboral-2026/001/>)

## 99 municipalities celebrate San Sebastián

Its local holiday in 2026, by region. Each municipality links to its annual record and the available official source.

Together, they account for 506,179 residents in the INE municipal register at 1 January 2025.

**Aragón** (30): Abanto, Aínsa-Sobrarbe, Ainzón, Alforque, Almunia de San Juan, Ambel, Ansó, Azanuy-Alins, Biscarrués, Carenas, Castejón de Monegros, Castejón de Sos, Fayón, Fueva, La, Jasa, Labuerda, Laspuña, Lechón, Longares, Magallón, Naval, Nuévalos, Orés, Pedrola, Piedratajada, Puértolas, Salvatierra de Esca, Sangarrén, Sierra de Luna, Sotonera, La

**Castilla y León** (21): Aldeanueva de la Serrezuela, Altable, Ausejo de la Sierra, Buitrago, Campillo de Azaba, Casillas, Ciudad Rodrigo, Dévanos, Mironcillo, Moraleja de Matacabras, Puebla de Pedraza, Rollamienta, Royuela de Río Franco, Rueda, San Miguel de la Ribera, Santa Marta del Cerro, Sanzoles, Siete Iglesias de Trabancos, Villacastín, Villaverde de Íscar, Vozmediano

**Castilla-La Mancha** (21): Alarcón, Campillos-Paravientos, Condemios de Arriba, Fernán Caballero, Graja de Campalbo, Hinojosa, La, Huerce, La, Madridejos, Marrupe, Medranda, Mohedas de la Jara, Montesclaros, Nuño Gómez, Parrillas, Pastrana, Robledo del Mazo, Sevilleja de la Jara, Sotillo de las Palomas, Talayuelas, Valdarachas, Valdemanco del Esteras

**Andalucía** (6): Alhaurín de la Torre, Frigiliana, Marchena, Níjar, Puebla del Río, La, Quesada

**Comunitat Valenciana** (5): Godella, Losa del Obispo, Polinyà de Xúquer, Sot de Chera, Vinaròs

**Comunidad de Madrid** (4): Boalo, El, Cercedilla, Torrejón de la Calzada, Villaviciosa de Odón

**La Rioja** (4): Corera, Medrano, Rodezno, San Román de Cameros

**Comunidad Foral de Navarra** (3): Aras, Sangüesa/Zangoza, Tafalla

**País Vasco** (2): Azpeitia, Donostia/San Sebastián

**Cantabria** (1): Reinosa

**Extremadura** (1): Cristina

**Galicia** (1): Castro Caldelas


## About San Sebastián

### When is San Sebastián in 2026?

In 2026, San Sebastián is mainly celebrated on 20 January 2026 (Tuesday). Some municipalities move it to another date on the working calendar.

### In how many municipalities is San Sebastián a holiday?

It's a local holiday in 99 municipalities in 2026, accounting for 506,179 residents in the 2025 register; mostly in Aragón (30 municipalities).

### Is San Sebastián a national holiday?

No. San Sebastián is a local-level holiday: it's only a non-working day in the municipalities that set it as their local festival; each keeps its official source.


## Other holidays

- Saint Isidore the Laborer (488 municipalities)
- San Roque (278 municipalities)
- Segona Pasqua (189 municipalities)
- Martes de Entroido (186 municipalities)
- San Isidro Labrador (163 municipalities)
- San Blas (151 municipalities)
- San Vicente Ferrer (142 municipalities)
- San Pedro (136 municipalities)

Per-municipality data with its official source (regional gazette). Every date is verifiable on the municipality page. Data from festivos.io — CC BY 4.0.

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Data: festivos.io — CC BY 4.0. Official source: State Official Gazette (BOE) and regional gazettes (Law 37/2007).