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How many working days in year 2013?
Here is the detail of the calculation:
Because 2013 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 10 public holidays that do not fall during a weekend and we obtain 251 working days in 2013.
 Here is the list of these 10 public holidays: 
 
 1. New Year's Day : вівторок, 1 січень, 2013 
2. St. Patrick's Day (substitute day) : понеділок, 18 березень, 2013 
3. Good Friday : п'ятниця, 29 березень, 2013 
4. Easter Monday : понеділок, 1 квітень, 2013 
5. Early May Bank Holiday : понеділок, 6 травень, 2013 
6. Spring Bank Holiday : понеділок, 27 травень, 2013 
7. Orangemen's Day : п'ятниця, 12 липень, 2013 
8. Late Summer Bank Holiday : понеділок, 26 серпень, 2013 
9. Christmas Day : середа, 25 грудень, 2013 
10. Boxing Day : четвер, 26 грудень, 2013 
And here is the public holiday falling on a weekend:
1. St. Patrick's Day : неділя, 17 березень, 2013