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How many working days in year 1913?
Here is the detail of the calculation:
Because 1913 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 8 public holidays that do not fall during a weekend and we obtain 253 working days in 1913.
 Here is the list of these 8 public holidays: 
 
 1. New Year's Day : Wednesday, 1 January, 1913 
2. Good Friday : Friday, 21 March, 1913 
3. Easter Monday : Monday, 24 March, 1913 
4. Queen's Day : Wednesday, 30 April, 1913 
5. Ascension Day : Thursday, 1 May, 1913 
6. Pentecost Monday : Monday, 12 May, 1913 
7. Christmas Day : Thursday, 25 December, 1913 
8. Boxing Day : Friday, 26 December, 1913 
And here are the 2 public holidays falling on a weekend:
1. Easter Sunday : Sunday, 23 March, 1913 
2. Pentecost Sunday : Sunday, 11 May, 1913