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How many working days in year 1936?
Here is the detail of the calculation:
Because 1936 is a leap year, it has 366 days.
Let's remove 52 saturdays and 52 sundays. It remains 262 days.
Now, let's remove 11 public holidays that do not fall during a weekend and we obtain 251 working days in 1936.
 Here is the list of these 11 public holidays: 
 
 1. Restoration Day of the Independent Czech State : середа, 1 січень, 1936 
2. Good Friday : п'ятниця, 10 квітень, 1936 
3. Easter Monday : понеділок, 13 квітень, 1936 
4. Labour Day : п'ятниця, 1 травень, 1936 
5. Liberation Day : п'ятниця, 8 травень, 1936 
6. Jan Hus Day : понеділок, 6 липень, 1936 
7. St Wenceslas Day : понеділок, 28 вересень, 1936 
8. Independence Day : середа, 28 жовтень, 1936 
9. Freedom and Democracy Day : вівторок, 17 листопад, 1936 
10. Christmas Eve : четвер, 24 грудень, 1936 
11. Christmas Day : п'ятниця, 25 грудень, 1936 
And here are the 2 public holidays falling on a weekend:
1. St Cyril and Methodius' Day : неділя, 5 липень, 1936 
2. St. Stephen's Day : субота, 26 грудень, 1936