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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 10 public holidays that do not fall during a weekend and we obtain 251 working days in 1900.

Here is the list of these 10 public holidays:

1. New Year's Day : понедельник, 1 январь, 1900
2. Australia Day : пятница, 26 январь, 1900
3. Labour Day : понедельник, 12 март, 1900
4. Good Friday : пятница, 13 апрель, 1900
5. Easter Monday : понедельник, 16 апрель, 1900
6. Anzac Day : среда, 25 апрель, 1900
7. King's Birthday : понедельник, 11 июнь, 1900
8. Melbourne Cup : вторник, 6 ноябрь, 1900
9. Christmas Day : вторник, 25 декабрь, 1900
10. Boxing Day : среда, 26 декабрь, 1900

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

1. Easter Saturday : суббота, 14 апрель, 1900
2. Easter Sunday : воскресенье, 15 апрель, 1900