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How many working days in year 1915?
Here is the detail of the calculation:
Because 1915 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 1915.
 Here is the list of these 12 public holidays: 
 
 1. New Year's Day : п'ятниця, 1 січень, 1915 
2. Good Friday : п'ятниця, 2 квітень, 1915 
3. Easter Monday : понеділок, 5 квітень, 1915 
4. Victoria Day : понеділок, 24 травень, 1915 
5. National Aboriginal Day : понеділок, 21 червень, 1915 
6. Canada Day : четвер, 1 липень, 1915 
7. August Civic Holiday : понеділок, 2 серпень, 1915 
8. Labour Day : понеділок, 6 вересень, 1915 
9. Thanksgiving : понеділок, 11 жовтень, 1915 
10. Remembrance Day : четвер, 11 листопад, 1915 
11. Christmas (observance) : понеділок, 27 грудень, 1915 
12. Boxing Day (observance) : вівторок, 28 грудень, 1915 
And here are the 2 public holidays falling on a weekend:
1. Christmas : субота, 25 грудень, 1915 
2. Boxing Day : неділя, 26 грудень, 1915