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How many working days in year 2069?
Here is the detail of the calculation:
Because 2069 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 2069.
 Here is the list of these 9 public holidays: 
 
 1. Нова Година : Tuesday, 1 January, 2069 
2. Празник после Нове Године : Wednesday, 2 January, 2069 
3. Божић : Monday, 7 January, 2069 
4. Дан државности Србије : Friday, 15 February, 2069 
5. Велики петак : Friday, 12 April, 2069 
6. Васкршњи понедељак : Monday, 15 April, 2069 
7. Празник рада : Wednesday, 1 May, 2069 
8. Празник после Празника рада : Thursday, 2 May, 2069 
9. Дан примирја : Monday, 11 November, 2069 
And here are the 3 public holidays falling on a weekend:
1. Дан после Дана државности Србије : Saturday, 16 February, 2069 
2. Васкршња субота : Saturday, 13 April, 2069 
3. Васкрс : Sunday, 14 April, 2069