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How many working days in year 1993?

Here is the detail of the calculation:

Because 1993 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 1993.

Here is the list of these 10 public holidays:

1. New Year's Day : пятница, январь 1, 1993
2. Memorial Day : понедельник, май 31, 1993
3. Juneteenth (observance) : пятница, июнь 18, 1993
4. Independence Day (observance) : понедельник, июль 5, 1993
5. Labor Day : понедельник, сентябрь 6, 1993
6. Columbus Day : понедельник, октябрь 11, 1993
7. Veterans Day : четверг, ноябрь 11, 1993
8. Thanksgiving : четверг, ноябрь 25, 1993
9. Christmas (observance) : пятница, декабрь 24, 1993
10. New Year's Day (observance) : пятница, декабрь 31, 1993

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

1. Juneteenth National Independence Day : суббота, июнь 19, 1993
2. Independence Day : воскресенье, июль 4, 1993
3. Christmas : суббота, декабрь 25, 1993