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How many working days in year 1939?
Here is the detail of the calculation:
Because 1939 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 11 public holidays that do not fall during a weekend and we obtain 249 working days in 1939.
 Here is the list of these 11 public holidays: 
 
 1. Novoletni dan : Monday, 2 January, 1939 
2. Prešernov dan : Wednesday, 8 February, 1939 
3. Velikonočni ponedeljek : Monday, 10 April, 1939 
4. Dan upora proti okupatorju : Thursday, 27 April, 1939 
5. Praznik dela : Monday, 1 May, 1939 
6. Praznik dela : Tuesday, 2 May, 1939 
7. Marijino vnebovzetje : Tuesday, 15 August, 1939 
8. Dan reformacije : Tuesday, 31 October, 1939 
9. Dan spomina na mrtve : Wednesday, 1 November, 1939 
10. Božič : Monday, 25 December, 1939 
11. Dan samostojnosti in enotnosti : Tuesday, 26 December, 1939 
And here are the 4 public holidays falling on a weekend:
1. Novo leto : Sunday, 1 January, 1939 
2. Velika noč : Sunday, 9 April, 1939 
3. Binkošti : Sunday, 28 May, 1939 
4. Dan državnosti : Sunday, 25 June, 1939