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How many working days in year 2011?
Here is the detail of the calculation:
Because 2011 is not a leap year, it has 365 days.
Let's remove 53 saturdays and 52 sundays. It remains 260 days.
Now, let's remove 10 public holidays that do not fall during a weekend and we obtain 250 working days in 2011.
 Here is the list of these 10 public holidays: 
 
 1. New Year's Day Observance : понеділок, 3 січень, 2011 
2. Australia Day : середа, 26 січень, 2011 
3. Good Friday : п'ятниця, 22 квітень, 2011 
4. Easter Monday : понеділок, 25 квітень, 2011 
5. Additional public holiday because Anzac day falling on week end : вівторок, 26 квітень, 2011 
6. May Day : понеділок, 2 травень, 2011 
7. King's Birthday : понеділок, 13 червень, 2011 
8. Picnic Day : понеділок, 1 серпень, 2011 
9. Christmas Day Observance : понеділок, 26 грудень, 2011 
10. Boxing Day Observance : вівторок, 27 грудень, 2011 
And here are the 4 public holidays falling on a weekend:
1. New Year's Day : субота, 1 січень, 2011 
2. Easter Saturday : субота, 23 квітень, 2011 
3. Easter Sunday : неділя, 24 квітень, 2011 
4. Christmas Day : неділя, 25 грудень, 2011