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How many working days in year 1911?
Here is the detail of the calculation:
Because 1911 is not a leap year, it has 365 days.
Let's remove 52 saturdays and 53 sundays. It remains 260 days.
Now, let's remove 11 public holidays that do not fall during a weekend and we obtain 249 working days in 1911.
 Here is the list of these 11 public holidays: 
 
 1. Epifanía del Señor : Friday, 6 January, 1911 
2. Jueves santo : Thursday, 13 April, 1911 
3. Viernes Santo : Friday, 14 April, 1911 
4. Fiesta del Trabajo : Monday, 1 May, 1911 
5. Día de Canarias : Tuesday, 30 May, 1911 
6. Asuncíon de la Virgen : Tuesday, 15 August, 1911 
7. Fiesta nacional de España : Thursday, 12 October, 1911 
8. Todos los Santos : Wednesday, 1 November, 1911 
9. Día de la Constitución Española : Wednesday, 6 December, 1911 
10. Immaculada Concepcíon : Friday, 8 December, 1911 
11. Día de Navidad : Monday, 25 December, 1911 
And here is the public holiday falling on a weekend:
1. Año Nuevo : Sunday, 1 January, 1911