Define a period

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How many working days in year 2012?

Here is the detail of the calculation:

Because 2012 is a leap year, it has 366 days.

Let's remove 52 saturdays and 53 sundays. It remains 261 days.

Now, let's remove 9 public holidays that do not fall during a weekend and we obtain 252 working days in 2012.

Here is the list of these 9 public holidays:

1. Lunes de Carnaval : Monday, 20 February, 2012
2. Martes de Carnaval : Tuesday, 21 February, 2012
3. Viernes Santo : Friday, 6 April, 2012
4. Día del Trabajo : Monday, 30 April, 2012
5. Batalla de Pichincha : Friday, 25 May, 2012
6. Primer Grito de la Independencia : Friday, 10 August, 2012
7. Independencia de Guayaquil : Monday, 8 October, 2012
8. Día de los Difuntos : Friday, 2 November, 2012
9. Navidad : Tuesday, 25 December, 2012

And here is the public holiday falling on a weekend:

1. Año Nuevo : Sunday, 1 January, 2012