Определить период

...

How many working days in year 1986?

Here is the detail of the calculation:

Because 1986 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 1986.

Here is the list of these 11 public holidays:

1. New Year's Day : среда, 1 январь, 1986
2. Good Friday : пятница, 28 март, 1986
3. Easter Monday : понедельник, 31 март, 1986
4. Victoria Day : понедельник, 19 май, 1986
5. Canada Day : вторник, 1 июль, 1986
6. August Civic Holiday : понедельник, 4 август, 1986
7. Labour Day : понедельник, 1 сентябрь, 1986
8. Thanksgiving : понедельник, 13 октябрь, 1986
9. Remembrance Day : вторник, 11 ноябрь, 1986
10. Christmas : четверг, 25 декабрь, 1986
11. Boxing Day : пятница, 26 декабрь, 1986

And here is the public holiday falling on a weekend:

1. National Aboriginal Day : суббота, 21 июнь, 1986