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How many working days in year 2007?
Here is the detail of the calculation:
Because 2007 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 17 public holidays that do not fall during a weekend and we obtain 244 working days in 2007.
 Here is the list of these 17 public holidays: 
 
 1. Año Nuevo : Monday, 1 January, 2007 
2. Día de los Reyes Magos : Monday, 8 January, 2007 
3. Día de San José : Monday, 19 March, 2007 
4. Jueves Santo : Thursday, 5 April, 2007 
5. Viernes Santo : Friday, 6 April, 2007 
6. Primero de Mayo : Tuesday, 1 May, 2007 
7. La Ascensión del Señor : Monday, 21 May, 2007 
8. Corpus Christi : Monday, 11 June, 2007 
9. El Sagrado Corazón de Jesús : Monday, 18 June, 2007 
10. San Pedro y San Pablo : Monday, 2 July, 2007 
11. Grito de Independencia : Friday, 20 July, 2007 
12. Batalla de Boyaca : Tuesday, 7 August, 2007 
13. La Asunción de la Virgen : Monday, 20 August, 2007 
14. Día de la Raza : Monday, 15 October, 2007 
15. Día de Todos los Santos : Monday, 5 November, 2007 
16. Independencia de Cartagena : Monday, 12 November, 2007 
17. Navidad : Tuesday, 25 December, 2007 
And here are the 2 public holidays falling on a weekend:
1. Domingo de Pascua : Sunday, 8 April, 2007 
2. Día de la Inmaculada Concepción : Saturday, 8 December, 2007