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How many working days in year 2028?
Here is the detail of the calculation:
Because 2028 is a leap year, it has 366 days.
Let's remove 53 saturdays and 53 sundays. It remains 260 days.
Now, let's remove 12 public holidays that do not fall during a weekend and we obtain 248 working days in 2028.
 Here is the list of these 12 public holidays: 
 
 1. Epifanía del Señor : Thursday, 6 January, 2028 
2. Jueves santo : Thursday, 13 April, 2028 
3. Viernes Santo : Friday, 14 April, 2028 
4. Lunes de Pascua : Monday, 17 April, 2028 
5. Fiesta del Trabajo : Monday, 1 May, 2028 
6. Santiago Apóstol : Tuesday, 25 July, 2028 
7. Asuncíon de la Virgen : Tuesday, 15 August, 2028 
8. Fiesta nacional de España : Thursday, 12 October, 2028 
9. Todos los Santos : Wednesday, 1 November, 2028 
10. Día de la Constitución Española : Wednesday, 6 December, 2028 
11. Immaculada Concepcíon : Friday, 8 December, 2028 
12. Día de Navidad : Monday, 25 December, 2028 
And here is the public holiday falling on a weekend:
1. Año Nuevo : Saturday, 1 January, 2028