Define a period

...

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 12 public holidays that do not fall during a weekend and we obtain 249 working days in 1985.

Here is the list of these 12 public holidays:

1. Novo leto : Tuesday, 1 January, 1985
2. Novoletni dan : Wednesday, 2 January, 1985
3. Prešernov dan : Friday, 8 February, 1985
4. Velikonočni ponedeljek : Monday, 8 April, 1985
5. Praznik dela : Wednesday, 1 May, 1985
6. Praznik dela : Thursday, 2 May, 1985
7. Dan državnosti : Tuesday, 25 June, 1985
8. Marijino vnebovzetje : Thursday, 15 August, 1985
9. Dan reformacije : Thursday, 31 October, 1985
10. Dan spomina na mrtve : Friday, 1 November, 1985
11. Božič : Wednesday, 25 December, 1985
12. Dan samostojnosti in enotnosti : Thursday, 26 December, 1985

And here are the 3 public holidays falling on a weekend:

1. Velika noč : Sunday, 7 April, 1985
2. Dan upora proti okupatorju : Saturday, 27 April, 1985
3. Binkošti : Sunday, 26 May, 1985