Определить период

...

How many working days in year 2013?

Here is the detail of the calculation:

Because 2013 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 2013.

Here is the list of these 10 public holidays:

1. New Year's Day : вторник, 1 январь, 2013
2. Easter Monday : понедельник, 1 апрель, 2013
3. Labour Day : среда, 1 май, 2013
4. National Day : четверг, 30 май, 2013
5. Victory and Homeland Thanksgiving Day : понедельник, 5 август, 2013
6. Assumption Day : четверг, 15 август, 2013
7. All Saints' Day : пятница, 1 ноябрь, 2013
8. Remembrance Day : понедельник, 18 ноябрь, 2013
9. Christmas Day : среда, 25 декабрь, 2013
10. St. Stephen's Day : четверг, 26 декабрь, 2013

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

1. Epiphany : воскресенье, 6 январь, 2013
2. Easter : воскресенье, 31 март, 2013
3. Anti-Fascist Struggle Day : суббота, 22 июнь, 2013