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How many working days in year 2047?
Here is the detail of the calculation:
Because 2047 is not a leap year, it has 365 days.
Let's remove 52 saturdays and 52 sundays. It remains 261 days.
Now, let's remove 11 public holidays that do not fall during a weekend and we obtain 250 working days in 2047.
 Here is the list of these 11 public holidays: 
 
 1. Año Nuevo : Tuesday, 1 January, 2047 
2. Epifanía del Señor : Monday, 7 January, 2047 
3. Jueves santo : Thursday, 11 April, 2047 
4. Viernes Santo : Friday, 12 April, 2047 
5. Fiesta del Trabajo : Wednesday, 1 May, 2047 
6. San Antonio : Thursday, 13 June, 2047 
7. Nuestra Señora de África : Monday, 5 August, 2047 
8. Asuncíon de la Virgen : Thursday, 15 August, 2047 
9. Todos los Santos : Friday, 1 November, 2047 
10. Día de la Constitución Española : Friday, 6 December, 2047 
11. Día de Navidad : Wednesday, 25 December, 2047 
And here are the 3 public holidays falling on a weekend:
1. Epifanía del Señor : Sunday, 6 January, 2047 
2. Fiesta nacional de España : Saturday, 12 October, 2047 
3. Immaculada Concepcíon : Sunday, 8 December, 2047