Define a period

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How many working days in year 1997?

Here is the detail of the calculation:

Because 1997 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 1997.

Here is the list of these 12 public holidays:

1. New Year's Day : Wednesday, 1 January, 1997
2. National day : Monday, 3 March, 1997
3. Orthodox Easter Friday : Friday, 25 April, 1997
4. Orthodox Easter Monday : Monday, 28 April, 1997
5. Labour Day : Thursday, 1 May, 1997
6. St. George's Day : Tuesday, 6 May, 1997
7. Culture and Literacy Day (observance) : Monday, 26 May, 1997
8. Unification Day (observance) : Monday, 8 September, 1997
9. Independence Day : Monday, 22 September, 1997
10. Christmas Eve : Wednesday, 24 December, 1997
11. Christmas Day : Thursday, 25 December, 1997
12. Boxing day : Friday, 26 December, 1997

And here are the 4 public holidays falling on a weekend:

1. Orthodox Easter Saturday : Saturday, 26 April, 1997
2. Orthodox Easter Sunday : Sunday, 27 April, 1997
3. Culture and Literacy Day : Saturday, 24 May, 1997
4. Unification Day : Saturday, 6 September, 1997