Define a period

...

How many working days in year 1976?

Here is the detail of the calculation:

Because 1976 is a leap year, it has 366 days.

Let's remove 52 saturdays and 52 sundays. It remains 262 days.

Now, let's remove 6 public holidays that do not fall during a weekend and we obtain 256 working days in 1976.

Here is the list of these 6 public holidays:

1. Novo leto : Thursday, 1 January, 1976
2. Novoletni dan : Friday, 2 January, 1976
3. Velikonočni ponedeljek : Monday, 19 April, 1976
4. Dan upora proti okupatorju : Tuesday, 27 April, 1976
5. Dan državnosti : Friday, 25 June, 1976
6. Dan spomina na mrtve : Monday, 1 November, 1976

And here are the 9 public holidays falling on a weekend:

1. Prešernov dan : Sunday, 8 February, 1976
2. Velika noč : Sunday, 18 April, 1976
3. Praznik dela : Saturday, 1 May, 1976
4. Praznik dela : Sunday, 2 May, 1976
5. Binkošti : Sunday, 6 June, 1976
6. Marijino vnebovzetje : Sunday, 15 August, 1976
7. Dan reformacije : Sunday, 31 October, 1976
8. Božič : Saturday, 25 December, 1976
9. Dan samostojnosti in enotnosti : Sunday, 26 December, 1976