Define a period

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How many working days in year 1931?

Here is the detail of the calculation:

Because 1931 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 1931.

Here is the list of these 12 public holidays:

1. New Year's Day : Thursday, 1 January, 1931
2. National day : Tuesday, 3 March, 1931
3. Orthodox Easter Friday : Friday, 10 April, 1931
4. Orthodox Easter Monday : Monday, 13 April, 1931
5. Labour Day : Friday, 1 May, 1931
6. St. George's Day : Wednesday, 6 May, 1931
7. Culture and Literacy Day (observance) : Monday, 25 May, 1931
8. Unification Day (observance) : Monday, 7 September, 1931
9. Independence Day : Tuesday, 22 September, 1931
10. Christmas Eve : Thursday, 24 December, 1931
11. Christmas Day : Friday, 25 December, 1931
12. Christmas Day (observance) : Monday, 28 December, 1931

And here are the 5 public holidays falling on a weekend:

1. Orthodox Easter Saturday : Saturday, 11 April, 1931
2. Orthodox Easter Sunday : Sunday, 12 April, 1931
3. Culture and Literacy Day : Sunday, 24 May, 1931
4. Unification Day : Sunday, 6 September, 1931
5. Boxing day : Saturday, 26 December, 1931