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How many working days in year 1915?

Here is the detail of the calculation:

Because 1915 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 8 public holidays that do not fall during a weekend and we obtain 253 working days in 1915.

Here is the list of these 8 public holidays:

1. New Year's Day : пятница, 1 январь, 1915
2. Good Friday : пятница, 2 апрель, 1915
3. Easter Monday : понедельник, 5 апрель, 1915
4. National Patriots' Day : понедельник, 24 май, 1915
5. National Holiday of Quebec : четверг, 24 июнь, 1915
6. Canada Day : четверг, 1 июль, 1915
7. Labour Day : понедельник, 6 сентябрь, 1915
8. Thanksgiving : понедельник, 11 октябрь, 1915

And here is the public holiday falling on a weekend:

1. Christmas : суббота, 25 декабрь, 1915