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 8 public holidays that do not fall during a weekend and we obtain 253 working days in 2009.

Here is the list of these 8 public holidays:

1. Año Nuevo : Thursday, 1 January, 2009
2. Día de la Constitución : Monday, 2 February, 2009
3. Natalicio de Benito Juárez : Monday, 16 March, 2009
4. Viernes Santo : Friday, 10 April, 2009
5. Día del Trabajo : Friday, 1 May, 2009
6. Día de la Independencia : Wednesday, 16 September, 2009
7. Día de la Revolución : Monday, 16 November, 2009
8. Navidad : Friday, 25 December, 2009