Monday following Spanish Constitution Day
The Monday after Spanish Constitution Day is a public holiday that applies when 6 December falls on a Sunday; in 2026 it falls on Monday 7 December.
Substitutable national holiday
7 December 2026
24,223,090
The Official State Gazette lists it as a substitutable national holiday: each community decides whether to keep or replace it. In 2026 it is a holiday in: Andalucía, Aragón, Cantabria, Castilla y León, Comunidad de Madrid, Extremadura, La Rioja, Melilla, Principado de Asturias and Región de Murcia.
Verified data
Monday following Spanish Constitution Day in the working calendar
In 2026, Monday following Spanish Constitution Day is recorded as a substitutable national holiday on 7 December 2026. The calendars included in the dataset apply it in 10 regions and autonomous cities, covering 24,223,090 residents in the 2025 register.
This comparison uses only the official working calendars incorporated into the dataset for each year.
| Year | Main date | Where recorded | Residents |
|---|---|---|---|
| 2026 | 7 December 2026 | 10 regions and autonomous cities | 24,223,090 |
Demographic profile
Demographics of the covered population
Age, citizenship, birthplace and average-age structure from the 2025 Annual Population Census.
51.2% / 48.8%
13.1%
66.3%
20.6%
12.2%
17%
44.5 years
How it differs from its surroundings
Comparison with Spain. 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 |
|---|---|---|
| Aged 0–14 | 13.1% | +0.2 pp |
| Aged 65+ | 20.6% | -0.1 pp |
| Foreign citizenship | 12.2% | -1.8 pp |
| Born outside Spain | 17% | -2.3 pp |
| Weighted mean age | 44.5 years | -0.1 years |
The largest difference from Spain is in “Born outside Spain”: -2.3 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.
What is Monday following Spanish Constitution Day
Spanish Constitution Day is celebrated every 6 December. When that date falls on a Sunday, as is the case in 2026, the Official State Gazette contemplates the following Monday as a substitutable national holiday: some territories incorporate 7 December into their working calendar and others replace it. It is not a new holiday, but the transfer of the rest day from 6 December.
In 2026, the Monday following Constitution Day is a holiday in Andalusia, Aragon, Asturias, Cantabria, Castilla and León, Extremadura, the Community of Madrid, the Region of Murcia, La Rioja and the autonomous city of Melilla. It is not in the rest of the communities, so it is advisable to also consult the regional calendar and local holidays of each municipality.
The day does not have its own celebration and functions as a day of rest linked to 6 December. In the territories where it applies, Monday the 7th is added to the national holiday of the Immaculate Conception on Tuesday, 8 December, which may give rise to a long December bridge.
Other holidays
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.