Define a period

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How many working days in year 1960?

Here is the detail of the calculation:

Because 1960 is a leap year, it has 366 days.

Let's remove 53 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 1960.

Here is the list of these 12 public holidays:

1. New Year's Day : Friday, 1 January, 1960
2. National day : Thursday, 3 March, 1960
3. Orthodox Easter Friday : Friday, 15 April, 1960
4. Orthodox Easter Monday : Monday, 18 April, 1960
5. Labour Day (observance) : Monday, 2 May, 1960
6. St. George's Day : Friday, 6 May, 1960
7. Culture and Literacy Day : Tuesday, 24 May, 1960
8. Unification Day : Tuesday, 6 September, 1960
9. Independence Day : Thursday, 22 September, 1960
10. Boxing day : Monday, 26 December, 1960
11. Christmas Day (observance) : Tuesday, 27 December, 1960
12. Christmas Day (observance) : Wednesday, 28 December, 1960

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

1. Orthodox Easter Saturday : Saturday, 16 April, 1960
2. Orthodox Easter Sunday : Sunday, 17 April, 1960
3. Labour Day : Sunday, 1 May, 1960
4. Christmas Eve : Saturday, 24 December, 1960
5. Christmas Day : Sunday, 25 December, 1960