Определить период

...

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 10 public holidays that do not fall during a weekend and we obtain 251 working days in 1973.

Here is the list of these 10 public holidays:

1. New Year's Day : понедельник, 1 январь, 1973
2. Easter Monday : понедельник, 23 апрель, 1973
3. Labour Day : вторник, 1 май, 1973
4. National Day : среда, 30 май, 1973
5. Corpus Christi : четверг, 21 июнь, 1973
6. Anti-Fascist Struggle Day : пятница, 22 июнь, 1973
7. Assumption Day : среда, 15 август, 1973
8. All Saints' Day : четверг, 1 ноябрь, 1973
9. Christmas Day : вторник, 25 декабрь, 1973
10. St. Stephen's Day : среда, 26 декабрь, 1973

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

1. Epiphany : суббота, 6 январь, 1973
2. Easter : воскресенье, 22 апрель, 1973
3. Victory and Homeland Thanksgiving Day : воскресенье, 5 август, 1973
4. Remembrance Day : воскресенье, 18 ноябрь, 1973