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How many working days in year 1900?

Here is the detail of the calculation:

Because 1900 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 9 public holidays that do not fall during a weekend and we obtain 252 working days in 1900.

Here is the list of these 9 public holidays:

1. New Year's Day : понедельник, 1 январь, 1900
2. Good Friday : пятница, 13 апрель, 1900
3. Victoria Day : понедельник, 21 май, 1900
4. National Aboriginal Day : четверг, 21 июнь, 1900
5. Canada Day (observance) : понедельник, 2 июль, 1900
6. Discovery Day : понедельник, 20 август, 1900
7. Labour Day : понедельник, 3 сентябрь, 1900
8. Thanksgiving : понедельник, 8 октябрь, 1900
9. Christmas : вторник, 25 декабрь, 1900

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

1. Canada Day : воскресенье, 1 июль, 1900
2. Remembrance Day : воскресенье, 11 ноябрь, 1900