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How many working days in year 1941?
Here is the detail of the calculation:
Because 1941 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 1941.
 Here is the list of these 12 public holidays: 
 
 1. Нова година : Wednesday, 1 January, 1941 
2. Национален ден : Monday, 3 March, 1941 
3. Православни Велики петък : Friday, 18 April, 1941 
4. Православни Велики понеделник : Monday, 21 April, 1941 
5. Ден на труда : Thursday, 1 May, 1941 
6. Гергьовден : Tuesday, 6 May, 1941 
7. Ден на културата и славянската писменост (наблюдаван) : Monday, 26 May, 1941 
8. Ден на съединението (наблюдаван) : Monday, 8 September, 1941 
9. Ден на независимостта : Monday, 22 September, 1941 
10. Бъдни вечер : Wednesday, 24 December, 1941 
11. Коледа : Thursday, 25 December, 1941 
12. Втори ден на Коледа : Friday, 26 December, 1941 
And here are the 4 public holidays falling on a weekend:
1. Православна Велика събота : Saturday, 19 April, 1941 
2. Православен Великден : Sunday, 20 April, 1941 
3. Ден на културата и славянската писменост : Saturday, 24 May, 1941 
4. Ден на съединението : Saturday, 6 September, 1941