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How many working days in year 2016?
Here is the detail of the calculation:
Because 2016 is a leap year, it has 366 days.
Let's remove 53 saturdays and 52 sundays. It remains 261 days.
Now, let's remove 15 public holidays that do not fall during a weekend and we obtain 246 working days in 2016.
 Here is the list of these 15 public holidays: 
 
 1. Año Nuevo : Friday, 1 January, 2016 
2. Día de los Reyes Magos : Monday, 11 January, 2016 
3. Día de San José : Monday, 21 March, 2016 
4. Jueves Santo : Thursday, 24 March, 2016 
5. Viernes Santo : Friday, 25 March, 2016 
6. La Ascensión del Señor : Monday, 9 May, 2016 
7. Corpus Christi : Monday, 30 May, 2016 
8. El Sagrado Corazón de Jesús : Monday, 6 June, 2016 
9. San Pedro y San Pablo : Monday, 4 July, 2016 
10. Grito de Independencia : Wednesday, 20 July, 2016 
11. La Asunción de la Virgen : Monday, 15 August, 2016 
12. Día de la Raza : Monday, 17 October, 2016 
13. Día de Todos los Santos : Monday, 7 November, 2016 
14. Independencia de Cartagena : Monday, 14 November, 2016 
15. Día de la Inmaculada Concepción : Thursday, 8 December, 2016 
And here are the 4 public holidays falling on a weekend:
1. Domingo de Pascua : Sunday, 27 March, 2016 
2. Primero de Mayo : Sunday, 1 May, 2016 
3. Batalla de Boyaca : Sunday, 7 August, 2016 
4. Navidad : Sunday, 25 December, 2016