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How many working days in year 1931?

Here is the detail of the calculation:

Because 1931 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 10 public holidays that do not fall during a weekend and we obtain 251 working days in 1931.

Here is the list of these 10 public holidays:

1. New Year's Day : четверг, 1 январь, 1931
2. Family Day : понедельник, 16 февраль, 1931
3. Good Friday : пятница, 3 апрель, 1931
4. Victoria Day : понедельник, 18 май, 1931
5. Canada Day : среда, 1 июль, 1931
6. August Civic Holiday : понедельник, 3 август, 1931
7. Labour Day : понедельник, 7 сентябрь, 1931
8. Thanksgiving : понедельник, 12 октябрь, 1931
9. Christmas : пятница, 25 декабрь, 1931
10. Boxing Day (observance) : понедельник, 28 декабрь, 1931

And here is the public holiday falling on a weekend:

1. Boxing Day : суббота, 26 декабрь, 1931