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How many working days in year 1940?
Here is the detail of the calculation:
Because 1940 is a leap year, it has 366 days.
Let's remove 52 saturdays and 52 sundays. It remains 262 days.
Now, let's remove 12 public holidays that do not fall during a weekend and we obtain 250 working days in 1940.
 Here is the list of these 12 public holidays: 
 
 1. New Year's Day : Monday, 1 January, 1940 
2. New Year Holiday : Tuesday, 2 January, 1940 
3. Preseren's Day : Thursday, 8 February, 1940 
4. Easter Monday : Monday, 25 March, 1940 
5. May Day : Wednesday, 1 May, 1940 
6. May Day Holiday : Thursday, 2 May, 1940 
7. Statehood Day : Tuesday, 25 June, 1940 
8. Assumption Day : Thursday, 15 August, 1940 
9. Reformation Day : Thursday, 31 October, 1940 
10. All Saints' Day : Friday, 1 November, 1940 
11. Christmas Day : Wednesday, 25 December, 1940 
12. Independence and Unity Day : Thursday, 26 December, 1940 
And here are the 3 public holidays falling on a weekend:
1. Easter : Sunday, 24 March, 1940 
2. Resistance Day : Saturday, 27 April, 1940 
3. Whitsunday : Sunday, 12 May, 1940