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How many working days in year 2100?

Here is the detail of the calculation:

Because 2100 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 2100.

Here is the list of these 10 public holidays:

1. New Year's Day : пятница, 1 январь, 2100
2. National day : среда, 3 март, 2100
3. Labour Day (observance) : понедельник, 3 май, 2100
4. St. George's Day : четверг, 6 май, 2100
5. Culture and Literacy Day : понедельник, 24 май, 2100
6. Unification Day : понедельник, 6 сентябрь, 2100
7. Independence Day : среда, 22 сентябрь, 2100
8. Christmas Eve : пятница, 24 декабрь, 2100
9. Christmas Day (observance) : понедельник, 27 декабрь, 2100
10. Christmas Day (observance) : вторник, 28 декабрь, 2100

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

1. Labour Day : суббота, 1 май, 2100
2. Christmas Day : суббота, 25 декабрь, 2100
3. Boxing day : воскресенье, 26 декабрь, 2100