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How many working days in year 1991?

Here is the detail of the calculation:

Because 1991 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 12 public holidays that do not fall during a weekend and we obtain 249 working days in 1991.

Here is the list of these 12 public holidays:

1. New Year's Day : вторник, январь 1, 1991
2. Martin Luther King Day : понедельник, январь 21, 1991
3. Lincoln's Birthday : вторник, февраль 12, 1991
4. Washington's Birthday : понедельник, февраль 18, 1991
5. Memorial Day : понедельник, май 27, 1991
6. Independence Day : четверг, июль 4, 1991
7. Labor Day : понедельник, сентябрь 2, 1991
8. Columbus Day : понедельник, октябрь 14, 1991
9. Election Day : вторник, ноябрь 5, 1991
10. Veterans Day : понедельник, ноябрь 11, 1991
11. Thanksgiving : четверг, ноябрь 28, 1991
12. Christmas : среда, декабрь 25, 1991