Определить период

...

How many working days in year 1930?

Here is the detail of the calculation:

Because 1930 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 1930.

Here is the list of these 9 public holidays:

1. New Year's Day : среда, 1 январь, 1930
2. Good Friday : пятница, 18 апрель, 1930
3. Easter Monday : понедельник, 21 апрель, 1930
4. National Patriots' Day : понедельник, 19 май, 1930
5. National Holiday of Quebec : вторник, 24 июнь, 1930
6. Canada Day : вторник, 1 июль, 1930
7. Labour Day : понедельник, 1 сентябрь, 1930
8. Thanksgiving : понедельник, 13 октябрь, 1930
9. Christmas : четверг, 25 декабрь, 1930