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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 9 public holidays that do not fall during a weekend and we obtain 251 working days in 1916.

Here is the list of these 9 public holidays:

1. National Day : среда, 15 март, 1916
2. Good Friday : пятница, 21 апрель, 1916
3. Easter Monday : понедельник, 24 апрель, 1916
4. Labour Day : понедельник, 1 май, 1916
5. Pentecost Monday : понедельник, 12 июнь, 1916
6. National Day : понедельник, 23 октябрь, 1916
7. All Saints' Day : среда, 1 ноябрь, 1916
8. Christmas Day : понедельник, 25 декабрь, 1916
9. Second Day of Christmas : 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. Easter Sunday : воскресенье, 23 апрель, 1916
3. Pentecost Sunday : воскресенье, 11 июнь, 1916
4. State Foundation Day : воскресенье, 20 август, 1916