Определить период

...

How many working days in year 1925?

Here is the detail of the calculation:

Because 1925 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 11 public holidays that do not fall during a weekend and we obtain 250 working days in 1925.

Here is the list of these 11 public holidays:

1. Restoration Day of the Independent Czech State : четверг, 1 январь, 1925
2. Good Friday : пятница, 10 апрель, 1925
3. Easter Monday : понедельник, 13 апрель, 1925
4. Labour Day : пятница, 1 май, 1925
5. Liberation Day : пятница, 8 май, 1925
6. Jan Hus Day : понедельник, 6 июль, 1925
7. St Wenceslas Day : понедельник, 28 сентябрь, 1925
8. Independence Day : среда, 28 октябрь, 1925
9. Freedom and Democracy Day : вторник, 17 ноябрь, 1925
10. Christmas Eve : четверг, 24 декабрь, 1925
11. Christmas Day : пятница, 25 декабрь, 1925

And here are the 2 public holidays falling on a weekend:

1. St Cyril and Methodius' Day : воскресенье, 5 июль, 1925
2. St. Stephen's Day : суббота, 26 декабрь, 1925