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How many working days in year 1938?
Here is the detail of the calculation:
Because 1938 is not a leap year, it has 365 days.
Let's remove 53 saturdays and 52 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 1938.
 Here is the list of these 11 public holidays: 
 
 1. Epifanía del Señor : Thursday, 6 January, 1938 
2. Jueves santo : Thursday, 14 April, 1938 
3. Viernes Santo : Friday, 15 April, 1938 
4. Fiesta de la Comunidad de Madrid : Monday, 2 May, 1938 
5. Santiago Apóstol : Monday, 25 July, 1938 
6. Asuncíon de la Virgen : Monday, 15 August, 1938 
7. Fiesta nacional de España : Wednesday, 12 October, 1938 
8. Todos los Santos : Tuesday, 1 November, 1938 
9. Día de la Constitución Española : Tuesday, 6 December, 1938 
10. Immaculada Concepcíon : Thursday, 8 December, 1938 
11. Día de Navidad : Monday, 26 December, 1938 
And here are the 3 public holidays falling on a weekend:
1. Año Nuevo : Saturday, 1 January, 1938 
2. Fiesta del Trabajo : Sunday, 1 May, 1938 
3. Día de Navidad : Sunday, 25 December, 1938