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How many working days in year 2019?
Here is the detail of the calculation:
Because 2019 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 2019.
 Here is the list of these 12 public holidays: 
 
 1. Нова година : Tuesday, 1 January, 2019 
2. Национален ден (наблюдаван) : Monday, 4 March, 2019 
3. Православни Велики петък : Friday, 26 April, 2019 
4. Православни Велики понеделник : Monday, 29 April, 2019 
5. Ден на труда : Wednesday, 1 May, 2019 
6. Гергьовден : Monday, 6 May, 2019 
7. Ден на културата и славянската писменост : Friday, 24 May, 2019 
8. Ден на съединението : Friday, 6 September, 2019 
9. Ден на независимостта (наблюдаван) : Monday, 23 September, 2019 
10. Бъдни вечер : Tuesday, 24 December, 2019 
11. Коледа : Wednesday, 25 December, 2019 
12. Втори ден на Коледа : Thursday, 26 December, 2019 
And here are the 4 public holidays falling on a weekend:
1. Национален ден : Sunday, 3 March, 2019 
2. Православна Велика събота : Saturday, 27 April, 2019 
3. Православен Великден : Sunday, 28 April, 2019 
4. Ден на независимостта : Sunday, 22 September, 2019