Определить период

...

How many working days in year 2015?

Here is the detail of the calculation:

Because 2015 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 9 public holidays that do not fall during a weekend and we obtain 252 working days in 2015.

Here is the list of these 9 public holidays:

1. New Year's Day : четверг, 1 январь, 2015
2. Second Day of the New Year : пятница, 2 январь, 2015
3. Orthodox Easter Friday : пятница, 10 апрель, 2015
4. Orthodox Easter Monday : понедельник, 13 апрель, 2015
5. Labour Day : пятница, 1 май, 2015
6. Pentecost Monday : понедельник, 1 июнь, 2015
7. St. Andrew's Day : понедельник, 30 ноябрь, 2015
8. National Day : вторник, 1 декабрь, 2015
9. Christmas Day : пятница, 25 декабрь, 2015

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

1. Union of the Romanian Principalities : суббота, 24 январь, 2015
2. Orthodox Easter Sunday : воскресенье, 12 апрель, 2015
3. Pentecost Sunday : воскресенье, 31 май, 2015
4. Assumption : суббота, 15 август, 2015
5. Boxing day : суббота, 26 декабрь, 2015