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How many working days in year 2142?

Here is the detail of the calculation:

Because 2142 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 2142.

Here is the list of these 10 public holidays:

1. New Year's Day : понедельник, 1 январь, 2142
2. National day (observance) : понедельник, 5 март, 2142
3. Labour Day : вторник, 1 май, 2142
4. St. George's Day (observance) : понедельник, 7 май, 2142
5. Culture and Literacy Day : четверг, 24 май, 2142
6. Unification Day : четверг, 6 сентябрь, 2142
7. Independence Day (observance) : понедельник, 24 сентябрь, 2142
8. Christmas Eve : понедельник, 24 декабрь, 2142
9. Christmas Day : вторник, 25 декабрь, 2142
10. Boxing day : среда, 26 декабрь, 2142

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

1. National day : суббота, 3 март, 2142
2. St. George's Day : воскресенье, 6 май, 2142
3. Independence Day : суббота, 22 сентябрь, 2142