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How many working days in year 1959?
Here is the detail of the calculation:
Because 1959 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 9 public holidays that do not fall during a weekend and we obtain 252 working days in 1959.
 Here is the list of these 9 public holidays: 
 
 1. Anul Nou : Thursday, 1 January, 1959 
2. A doua zi după Anul Nou : Friday, 2 January, 1959 
3. Vinerea Mare : Friday, 1 May, 1959 
4. A doua zi de Paște : Monday, 4 May, 1959 
5. Ziua Copilului : Monday, 1 June, 1959 
6. A doua zi de Rusalii : Monday, 22 June, 1959 
7. Sfântul Andrei : Monday, 30 November, 1959 
8. Ziua Națională a României : Tuesday, 1 December, 1959 
9. Crăciunul : Friday, 25 December, 1959 
And here are the 5 public holidays falling on a weekend:
1. Ziua Unirii Principatelor Române : Saturday, 24 January, 1959 
2. Paște ortodox : Sunday, 3 May, 1959 
3. Rusalii : Sunday, 21 June, 1959 
4. Adormirea Maicii Domnului : Saturday, 15 August, 1959 
5. A doua zi de Crăciun : Saturday, 26 December, 1959