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How many working days in year 1928?

Here is the detail of the calculation:

Because 1928 is a leap year, it has 366 days.

Let's remove 52 saturdays and 53 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 1928.

Here is the list of these 10 public holidays:

1. National Day : четверг, 15 март, 1928
2. Good Friday : пятница, 6 апрель, 1928
3. Easter Monday : понедельник, 9 апрель, 1928
4. Labour Day : вторник, 1 май, 1928
5. Pentecost Monday : понедельник, 28 май, 1928
6. State Foundation Day : понедельник, 20 август, 1928
7. National Day : вторник, 23 октябрь, 1928
8. All Saints' Day : четверг, 1 ноябрь, 1928
9. Christmas Day : вторник, 25 декабрь, 1928
10. Second Day of Christmas : среда, 26 декабрь, 1928

And here are the 3 public holidays falling on a weekend:

1. New Year's Day : воскресенье, 1 январь, 1928
2. Easter Sunday : воскресенье, 8 апрель, 1928
3. Pentecost Sunday : воскресенье, 27 май, 1928