Define a period

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How many working days in year 1985?

Here is the detail of the calculation:

Because 1985 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 1985.

Here is the list of these 8 public holidays:

1. Año Nuevo : Tuesday, 1 January, 1985
2. Día de la Constitución : Monday, 4 February, 1985
3. Natalicio de Benito Juárez : Monday, 18 March, 1985
4. Viernes Santo : Friday, 5 April, 1985
5. Día del Trabajo : Wednesday, 1 May, 1985
6. Día de la Independencia : Monday, 16 September, 1985
7. Día de la Revolución : Monday, 18 November, 1985
8. Navidad : Wednesday, 25 December, 1985