Define a period

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How many working days in year 1999?

Here is the detail of the calculation:

Because 1999 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 10 public holidays that do not fall during a weekend and we obtain 251 working days in 1999.

Here is the list of these 10 public holidays:

1. Año Nuevo : Friday, 1 January, 1999
2. Lunes de Carnaval : Monday, 15 February, 1999
3. Martes de Carnaval : Tuesday, 16 February, 1999
4. Viernes Santo : Friday, 2 April, 1999
5. Día del Trabajo : Friday, 30 April, 1999
6. Batalla de Pichincha : Monday, 24 May, 1999
7. Primer Grito de la Independencia : Monday, 9 August, 1999
8. Independencia de Guayaquil : Friday, 8 October, 1999
9. Día de los Difuntos : Monday, 1 November, 1999
10. Independencia de Cuenca : Friday, 5 November, 1999

And here is the public holiday falling on a weekend:

1. Navidad : Saturday, 25 December, 1999