Определить период

...

How many working days in year 1943?

Here is the detail of the calculation:

Because 1943 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 1943.

Here is the list of these 8 public holidays:

1. New Year's Day : пятница, 1 январь, 1943
2. Epiphany : среда, 6 январь, 1943
3. Easter Monday : понедельник, 26 апрель, 1943
4. Anti-Fascist Struggle Day : вторник, 22 июнь, 1943
5. Corpus Christi : четверг, 24 июнь, 1943
6. Victory and Homeland Thanksgiving Day : четверг, 5 август, 1943
7. All Saints' Day : понедельник, 1 ноябрь, 1943
8. Remembrance Day : четверг, 18 ноябрь, 1943

And here are the 6 public holidays falling on a weekend:

1. Easter : воскресенье, 25 апрель, 1943
2. Labour Day : суббота, 1 май, 1943
3. National Day : воскресенье, 30 май, 1943
4. Assumption Day : воскресенье, 15 август, 1943
5. Christmas Day : суббота, 25 декабрь, 1943
6. St. Stephen's Day : воскресенье, 26 декабрь, 1943