Определить период

...

How many working days in year 1978?

Here is the detail of the calculation:

Because 1978 is not a leap year, it has 365 days.

Let's remove 52 saturdays and 53 sundays. It remains 260 days.

Now, let's remove 8 public holidays that do not fall during a weekend and we obtain 252 working days in 1978.

Here is the list of these 8 public holidays:

1. Epiphany : пятница, 6 январь, 1978
2. Good Friday : пятница, 24 март, 1978
3. Easter Monday : понедельник, 27 март, 1978
4. May Day : понедельник, 1 май, 1978
5. Ascension Day : четверг, 4 май, 1978
6. Independence Day : среда, 6 декабрь, 1978
7. Christmas Day : понедельник, 25 декабрь, 1978
8. St Stephen's Day : вторник, 26 декабрь, 1978

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

1. New Year's Day : воскресенье, 1 январь, 1978
2. Easter Sunday : воскресенье, 26 март, 1978
3. Whit Sunday : воскресенье, 14 май, 1978
4. Midsummer Day : суббота, 24 июнь, 1978
5. All Saints' Day : суббота, 4 ноябрь, 1978