Определить период

...

How many working days in year 1985?

Here is the detail of the calculation:

Because 1985 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 8 public holidays that do not fall during a weekend and we obtain 253 working days in 1985.

Here is the list of these 8 public holidays:

1. New Year's Day : вторник, 1 январь, 1985
2. Good Friday : пятница, 5 апрель, 1985
3. Easter Monday : понедельник, 8 апрель, 1985
4. May Day : среда, 1 май, 1985
5. Ascension Day : четверг, 16 май, 1985
6. Independence Day : пятница, 6 декабрь, 1985
7. Christmas Day : среда, 25 декабрь, 1985
8. St Stephen's Day : четверг, 26 декабрь, 1985

And here are the 5 public holidays falling on a weekend:

1. Epiphany : воскресенье, 6 январь, 1985
2. Easter Sunday : воскресенье, 7 апрель, 1985
3. Whit Sunday : воскресенье, 26 май, 1985
4. Midsummer Day : суббота, 22 июнь, 1985
5. All Saints' Day : суббота, 2 ноябрь, 1985