Определить период

...

How many working days in year 1916?

Here is the detail of the calculation:

Because 1916 is a leap year, it has 366 days.

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

Now, let's remove 6 public holidays that do not fall during a weekend and we obtain 254 working days in 1916.

Here is the list of these 6 public holidays:

1. New Year's Day (observance) : понедельник, 3 январь, 1916
2. Heritage Day : понедельник, 21 февраль, 1916
3. Good Friday : пятница, 21 апрель, 1916
4. Canada Day (observance) : понедельник, 3 июль, 1916
5. Labour Day : понедельник, 4 сентябрь, 1916
6. Christmas : понедельник, 25 декабрь, 1916

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

1. New Year's Day : суббота, 1 январь, 1916
2. Canada Day : суббота, 1 июль, 1916