Define a period

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How many working days in year 1988?

Here is the detail of the calculation:

Because 1988 is a leap year, it has 366 days.

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

Now, let's remove 15 public holidays that do not fall during a weekend and we obtain 246 working days in 1988.

Here is the list of these 15 public holidays:

1. Año Nuevo : Friday, 1 January, 1988
2. Día de los Reyes Magos : Monday, 11 January, 1988
3. Día de San José : Monday, 21 March, 1988
4. Jueves Santo : Thursday, 31 March, 1988
5. Viernes Santo : Friday, 1 April, 1988
6. La Ascensión del Señor : Monday, 16 May, 1988
7. Corpus Christi : Monday, 6 June, 1988
8. El Sagrado Corazón de Jesús : Monday, 13 June, 1988
9. San Pedro y San Pablo : Monday, 4 July, 1988
10. Grito de Independencia : Wednesday, 20 July, 1988
11. La Asunción de la Virgen : Monday, 15 August, 1988
12. Día de la Raza : Monday, 17 October, 1988
13. Día de Todos los Santos : Monday, 7 November, 1988
14. Independencia de Cartagena : Monday, 14 November, 1988
15. Día de la Inmaculada Concepción : Thursday, 8 December, 1988

And here are the 4 public holidays falling on a weekend:

1. Domingo de Pascua : Sunday, 3 April, 1988
2. Primero de Mayo : Sunday, 1 May, 1988
3. Batalla de Boyaca : Sunday, 7 August, 1988
4. Navidad : Sunday, 25 December, 1988