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How many working days in year 1904?

Here is the detail of the calculation:

Because 1904 is a leap year, it has 366 days.

Let's remove 53 saturdays and 52 sundays. It remains 261 days.

Now, let's remove 6 public holidays that do not fall during a weekend and we obtain 255 working days in 1904.

Here is the list of these 6 public holidays:

1. New Year's Day : пятница, 1 январь, 1904
2. Independence Day : среда, 24 февраль, 1904
3. Good Friday : пятница, 1 апрель, 1904
4. Victory Day : четверг, 23 июнь, 1904
5. Midsummer Day : пятница, 24 июнь, 1904
6. Second Day of Christmas : понедельник, 26 декабрь, 1904

And here are the 6 public holidays falling on a weekend:

1. Easter : воскресенье, 3 апрель, 1904
2. Spring Day : воскресенье, 1 май, 1904
3. Pentecost : воскресенье, 22 май, 1904
4. Independence Restoration Day : суббота, 20 август, 1904
5. Christmas Eve : суббота, 24 декабрь, 1904
6. Christmas Day : воскресенье, 25 декабрь, 1904