Определить период

...

How many working days in year 1978?

Here is the detail of the calculation:

Because 1978 is not a leap year, it has 365 days.

Let's remove 52 saturdays and 53 sundays. It remains 260 days.

Now, let's remove 10 public holidays that do not fall during a weekend and we obtain 250 working days in 1978.

Here is the list of these 10 public holidays:

1. New Year's Day (observance) : понедельник, 2 январь, 1978
2. Family Day : понедельник, 20 февраль, 1978
3. Good Friday : пятница, 24 март, 1978
4. Victoria Day : понедельник, 22 май, 1978
5. Canada Day (observance) : понедельник, 3 июль, 1978
6. August Civic Holiday : понедельник, 7 август, 1978
7. Labour Day : понедельник, 4 сентябрь, 1978
8. Thanksgiving : понедельник, 9 октябрь, 1978
9. Christmas : понедельник, 25 декабрь, 1978
10. Boxing Day : вторник, 26 декабрь, 1978

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

1. New Year's Day : воскресенье, 1 январь, 1978
2. Canada Day : суббота, 1 июль, 1978