Assumption of Mary
The Assumption of Mary is celebrated every 15 August: a Marian solemnity of summer and the focus of many patron-saint festivals in Spain.
National holiday
15 August 2026
49,114,494
Verified data
Assumption of Mary in the working calendar
In 2026, Assumption of Mary is recorded as a national holiday on 15 August 2026. The calendars included in the dataset apply it in 19 regions and autonomous cities, covering 49,114,494 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 |
|---|---|---|---|
| 2024 | 15 August 2024 | 19 regions and autonomous cities | 48,587,813 |
| 2025 | 15 August 2025 | 19 regions and autonomous cities | 49,114,494 |
| 2026 | 15 August 2026 | 19 regions and autonomous cities | 49,114,494 |
Demographic profile
Demographics of the covered population
Age, citizenship, birthplace and average-age structure from the 2025 Annual Population Census.
51% / 49%
12.9%
66.4%
20.7%
14.1%
19.3%
44.6 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 | 12.9% | 0 pp |
| Aged 65+ | 20.7% | 0 pp |
| Foreign citizenship | 14.1% | 0 pp |
| Born outside Spain | 19.3% | 0 pp |
| Weighted mean age | 44.6 years | 0 years |
The covered population matches Spain overall on these indicators.
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 Assumption of Mary
15 August commemorates, in Catholic tradition, the Assumption of Mary into heaven. It is one of the great Marian solemnities of the liturgical year and, in Spain, a feast deeply rooted in the popular imagination of summer, when heat and holidays coincide with processions, street parties and pilgrimages.
Belief in the Assumption is ancient in East and West; the dogma was proclaimed in 1950, but the 15 August feast had been celebrated for centuries before. In many towns and cities the day overlaps with the main August festivals: Our Lady of the Assumption is patron or title of numerous parishes, and the procession or high mass sets the local calendar.
Beyond worship, 15 August works as a family gathering day in the heart of the summer season. Beaches, terraces and fairgrounds fill up; inland, fairs and clubs carry the celebration into the night. That double face — devotion and summer leisure — explains why the date remains so present in everyday life.
As a fixed-date solemnity, the Assumption closes the central stretch of August on the festive calendar. It does not need to move when it falls on a weekend to keep its meaning: it is the day many localities live both their religious feast and their busiest summer moment.
Solemnity of the Assumption of Mary.
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.