Define a period

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How many working days in year 1987?

Here is the detail of the calculation:

Because 1987 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 7 public holidays that do not fall during a weekend and we obtain 254 working days in 1987.

Here is the list of these 7 public holidays:

1. Novo leto : Thursday, 1 January, 1987
2. Novoletni dan : Friday, 2 January, 1987
3. Velikonočni ponedeljek : Monday, 20 April, 1987
4. Dan upora proti okupatorju : Monday, 27 April, 1987
5. Praznik dela : Friday, 1 May, 1987
6. Dan državnosti : Thursday, 25 June, 1987
7. Božič : Friday, 25 December, 1987

And here are the 8 public holidays falling on a weekend:

1. Prešernov dan : Sunday, 8 February, 1987
2. Velika noč : Sunday, 19 April, 1987
3. Praznik dela : Saturday, 2 May, 1987
4. Binkošti : Sunday, 7 June, 1987
5. Marijino vnebovzetje : Saturday, 15 August, 1987
6. Dan reformacije : Saturday, 31 October, 1987
7. Dan spomina na mrtve : Sunday, 1 November, 1987
8. Dan samostojnosti in enotnosti : Saturday, 26 December, 1987