Определить период

...

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 : среда, 1 январь, 1997
2. Epiphany : понедельник, 6 январь, 1997
3. Easter Monday : понедельник, 31 март, 1997
4. Labour Day : четверг, 1 май, 1997
5. Corpus Christi : четверг, 29 май, 1997
6. National Day : пятница, 30 май, 1997
7. Victory and Homeland Thanksgiving Day : вторник, 5 август, 1997
8. Assumption Day : пятница, 15 август, 1997
9. Remembrance Day : вторник, 18 ноябрь, 1997
10. Christmas Day : четверг, 25 декабрь, 1997
11. St. Stephen's Day : пятница, 26 декабрь, 1997

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

1. Easter : воскресенье, 30 март, 1997
2. Anti-Fascist Struggle Day : воскресенье, 22 июнь, 1997
3. All Saints' Day : суббота, 1 ноябрь, 1997