Определить период

...

How many working days in year 1984?

Here is the detail of the calculation:

Because 1984 is a leap year, it has 366 days.

Let's remove 52 saturdays and 53 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 1984.

Here is the list of these 10 public holidays:

1. National Day : четверг, 15 март, 1984
2. Good Friday : пятница, 20 апрель, 1984
3. Easter Monday : понедельник, 23 апрель, 1984
4. Labour Day : вторник, 1 май, 1984
5. Pentecost Monday : понедельник, 11 июнь, 1984
6. State Foundation Day : понедельник, 20 август, 1984
7. National Day : вторник, 23 октябрь, 1984
8. All Saints' Day : четверг, 1 ноябрь, 1984
9. Christmas Day : вторник, 25 декабрь, 1984
10. Second Day of Christmas : среда, 26 декабрь, 1984

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

1. New Year's Day : воскресенье, 1 январь, 1984
2. Easter Sunday : воскресенье, 22 апрель, 1984
3. Pentecost Sunday : воскресенье, 10 июнь, 1984