Define a period

...

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 11 public holidays that do not fall during a weekend and we obtain 250 working days in 1997.

Here is the list of these 11 public holidays:

1. New Year's Day : Wednesday, 1 January, 1997
2. Epiphany : Monday, 6 January, 1997
3. Easter Monday : Monday, 31 March, 1997
4. Labour Day : Thursday, 1 May, 1997
5. Corpus Christi : Thursday, 29 May, 1997
6. National Day : Friday, 30 May, 1997
7. Victory and Homeland Thanksgiving Day : Tuesday, 5 August, 1997
8. Assumption Day : Friday, 15 August, 1997
9. Remembrance Day : Tuesday, 18 November, 1997
10. Christmas Day : Thursday, 25 December, 1997
11. St. Stephen's Day : Friday, 26 December, 1997

And here are the 3 public holidays falling on a weekend:

1. Easter : Sunday, 30 March, 1997
2. Anti-Fascist Struggle Day : Sunday, 22 June, 1997
3. All Saints' Day : Saturday, 1 November, 1997