7 September is, in several municipalities of Madrid and Castile and León, the labour-calendar eve of the Nativity of Mary (8 September): the day off is moved to the Monday when the Marian feast falls mid-week.
Verified data
In 2026, the dataset records Nativity of Mary (labour-calendar eve) as a local holiday in 6 municipalities, accounting for 33,707 residents in the 2025 register. The most common date is 7 September 2026.
This comparison uses only the official working calendars incorporated into the dataset for each year.
Demographic profile
Age, citizenship, birthplace and average-age structure from the 2025 Annual Population Census.
49.5% / 50.5%
14.5%
68.5%
17%
13.5%
19%
42.7 years
Comparison with Spain and with the aggregate of the 2 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 2 regions |
|---|---|---|---|
| Aged 0–14 | 14.5% | +1.6 pp | +1.8 pp |
| Aged 65+ | 17% | -3.7 pp | -4 pp |
| Foreign citizenship | 13.5% | -0.6 pp | -1.1 pp |
| Born outside Spain | 19% | -0.2 pp | -2.5 pp |
| Weighted mean age | 42.7 years | -1.8 years | -2 years |
The largest difference from Spain is in “Aged 65+”: -3.7 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.
The Catholic Church keeps Mary’s birth on 8 September, nine months after the Immaculate Conception (8 December). It is one of the few nativities in the sanctoral — alongside those of Jesus and John the Baptist. The feast originated in the East (5th–6th centuries, linked to the Basilica of St Anne in Jerusalem) and reached the West around the 7th century.
The New Testament does not narrate Mary’s birth; the tradition about Joachim and Anne comes from the Protoevangelium of James, a 2nd-century apocryphal text. The liturgy nonetheless treats the date as a herald of salvation — a dawn before Christmas.
On the labour calendar the “eve” label does not invent another Marian title: it marks that the town hall shifts the holiday to the previous day (in 2026, Monday 7) so the festive leave is not lost. Places such as Fuente el Saz de Jarama, Hoyo de Manzanares or Villanubla illustrate that practice. The liturgical feast remains 8 September.
Nativity of Mary, one of the three nativities in the Roman calendar.
When
In 2026 it falls on Monday 7 September in most municipalities.
| Year | Main date | Municipalities |
|---|---|---|
| 2026 | Monday, 7 September | 6 |
Where it's a holiday
Its local holiday in 2026, by region. Each municipality links to its annual record and the available official source.
Together, they account for 33,707 residents in the INE municipal register at 1 January 2025.
Comunidad de Madrid4
Castilla y León2
FAQ
In 2026, Nativity of Mary (labour-calendar eve) is mainly celebrated on 7 September 2026 (Monday). Some municipalities move it to another date on the working calendar.
It's a local holiday in 6 municipalities in 2026, accounting for 33,707 residents in the 2025 register; mostly in Comunidad de Madrid (4 municipalities).
No. Nativity of Mary (labour-calendar eve) 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
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.