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How many working days in year 2000?
Here is the detail of the calculation:
Because 2000 is a leap year, it has 366 days.
Let's remove 53 saturdays and 53 sundays. It remains 260 days.
Now, let's remove 244 public holidays that do not fall during a weekend and we obtain 244 working days in 2000.
 Here is the list of these 244 public holidays: 
 
 1. Día de los Reyes Magos : Monday, 10 January, 2000 
2. Día de San José : Monday, 20 March, 2000 
3. Jueves Santo : Thursday, 20 April, 2000 
4. Viernes Santo : Friday, 21 April, 2000 
5. Primero de Mayo : Monday, 1 May, 2000 
6. La Ascensión del Señor : Monday, 5 June, 2000 
7. Corpus Christi : Monday, 26 June, 2000 
8. El Sagrado Corazón de Jesús : Monday, 3 July, 2000 
9. Grito de Independencia : Thursday, 20 July, 2000 
10. Batalla de Boyaca : Monday, 7 August, 2000 
11. La Asunción de la Virgen : Monday, 21 August, 2000 
12. Día de la Raza : Monday, 16 October, 2000 
13. Día de Todos los Santos : Monday, 6 November, 2000 
14. Independencia de Cartagena : Monday, 13 November, 2000 
15. Día de la Inmaculada Concepción : Friday, 8 December, 2000 
16. Navidad : Monday, 25 December, 2000 
And here are the 2 public holidays falling on a weekend:
1. Año Nuevo : Saturday, 1 January, 2000 
2. Domingo de Pascua : Sunday, 23 April, 2000