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. Good Friday : пятница, 21 апрель, 1916
2. Easter Monday : понедельник, 24 апрель, 1916
3. Labour Day : понедельник, 1 май, 1916
4. National Day : понедельник, 2 октябрь, 1916
5. Christmas Day : понедельник, 25 декабрь, 1916
6. Boxing Day : вторник, 26 декабрь, 1916

And here are the 4 public holidays falling on a weekend:

1. New Year's Day : суббота, 1 январь, 1916
2. Holy Saturday : суббота, 22 апрель, 1916
3. Establishment Day : суббота, 1 июль, 1916
4. National Day : воскресенье, 1 октябрь, 1916