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 8 public holidays that do not fall during a weekend and we obtain 253 working days in 1988.

Here is the list of these 8 public holidays:

1. Año Nuevo : Friday, 1 January, 1988
2. Lunes de Carnaval : Monday, 15 February, 1988
3. Martes de Carnaval : Tuesday, 16 February, 1988
4. Viernes Santo : Friday, 1 April, 1988
5. Día del Trabajo : Monday, 2 May, 1988
6. Batalla de Pichincha : Monday, 23 May, 1988
7. Independencia de Guayaquil : Monday, 10 October, 1988
8. Día de los Difuntos : Friday, 4 November, 1988

And here is the public holiday falling on a weekend:

1. Navidad : Sunday, 25 December, 1988