Define a period

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How many working days in year 1989?

Here is the detail of the calculation:

Because 1989 is not a leap year, it has 365 days.

Let's remove 52 saturdays and 53 sundays. It remains 260 days.

Now, let's remove 10 public holidays that do not fall during a weekend and we obtain 250 working days in 1989.

Here is the list of these 10 public holidays:

1. Jueves Santo : Thursday, 23 March, 1989
2. Viernes Santo : Friday, 24 March, 1989
3. Día del Trabajo : Monday, 1 May, 1989
4. Batalla de Arica y Día de la Bandera : Wednesday, 7 June, 1989
5. Día de San Pedro y San Pablo : Thursday, 29 June, 1989
6. Día de la Independencia : Friday, 28 July, 1989
7. Día de Santa Rosa de Lima : Wednesday, 30 August, 1989
8. Día de Todos los Santos : Wednesday, 1 November, 1989
9. Día de la Inmaculada Concepción : Friday, 8 December, 1989
10. Navidad : Monday, 25 December, 1989

And here are the 6 public holidays falling on a weekend:

1. Año Nuevo : Sunday, 1 January, 1989
2. Día de la Fuerza Aérea : Sunday, 23 July, 1989
3. Día de la Independencia : Saturday, 29 July, 1989
4. Batalla de Junin : Sunday, 6 August, 1989
5. Combate de Angamos : Sunday, 8 October, 1989
6. Batalla de Ayacucho : Saturday, 9 December, 1989