Define a period

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How many working days in year 1973?

Here is the detail of the calculation:

Because 1973 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 1973.

Here is the list of these 12 public holidays:

1. New Year's Day : Monday, 1 January, 1973
2. National day (observance) : Monday, 5 March, 1973
3. Orthodox Easter Friday : Friday, 27 April, 1973
4. Orthodox Easter Monday : Monday, 30 April, 1973
5. Labour Day : Tuesday, 1 May, 1973
6. St. George's Day (observance) : Monday, 7 May, 1973
7. Culture and Literacy Day : Thursday, 24 May, 1973
8. Unification Day : Thursday, 6 September, 1973
9. Independence Day (observance) : Monday, 24 September, 1973
10. Christmas Eve : Monday, 24 December, 1973
11. Christmas Day : Tuesday, 25 December, 1973
12. Boxing day : Wednesday, 26 December, 1973

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

1. National day : Saturday, 3 March, 1973
2. Orthodox Easter Saturday : Saturday, 28 April, 1973
3. Orthodox Easter Sunday : Sunday, 29 April, 1973
4. St. George's Day : Sunday, 6 May, 1973
5. Independence Day : Saturday, 22 September, 1973