Define a period

...

How many working days in year 2015?

Here is the detail of the calculation:

Because 2015 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 2015.

Here is the list of these 8 public holidays:

1. Año Nuevo : Thursday, 1 January, 2015
2. Día de la Constitución : Monday, 2 February, 2015
3. Natalicio de Benito Juárez : Monday, 16 March, 2015
4. Viernes Santo : Friday, 3 April, 2015
5. Día del Trabajo : Friday, 1 May, 2015
6. Día de la Independencia : Wednesday, 16 September, 2015
7. Día de la Revolución : Monday, 16 November, 2015
8. Navidad : Friday, 25 December, 2015