Define a period

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How many working days in year 2009?

Here is the detail of the calculation:

Because 2009 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 18 public holidays that do not fall during a weekend and we obtain 243 working days in 2009.

Here is the list of these 18 public holidays:

1. Año Nuevo : Thursday, 1 January, 2009
2. Día de los Reyes Magos : Monday, 12 January, 2009
3. Día de San José : Monday, 23 March, 2009
4. Jueves Santo : Thursday, 9 April, 2009
5. Viernes Santo : Friday, 10 April, 2009
6. Primero de Mayo : Friday, 1 May, 2009
7. La Ascensión del Señor : Monday, 25 May, 2009
8. Corpus Christi : Monday, 15 June, 2009
9. El Sagrado Corazón de Jesús : Monday, 22 June, 2009
10. San Pedro y San Pablo : Monday, 29 June, 2009
11. Grito de Independencia : Monday, 20 July, 2009
12. Batalla de Boyaca : Friday, 7 August, 2009
13. La Asunción de la Virgen : Monday, 17 August, 2009
14. Día de la Raza : Monday, 12 October, 2009
15. Día de Todos los Santos : Monday, 2 November, 2009
16. Independencia de Cartagena : Monday, 16 November, 2009
17. Día de la Inmaculada Concepción : Tuesday, 8 December, 2009
18. Navidad : Friday, 25 December, 2009

And here is the public holiday falling on a weekend:

1. Domingo de Pascua : Sunday, 12 April, 2009