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How many working days in year 1972?

Here is the detail of the calculation:

Because 1972 is a leap year, it has 366 days.

Let's remove 53 saturdays and 53 sundays. It remains 260 days.

Now, let's remove 11 public holidays that do not fall during a weekend and we obtain 249 working days in 1972.

Here is the list of these 11 public holidays:

1. Martin Luther King Day : понедельник, январь 17, 1972
2. Good Friday : пятница, март 31, 1972
3. Memorial Day : понедельник, май 29, 1972
4. Juneteenth National Independence Day : понедельник, июнь 19, 1972
5. Independence Day : вторник, июль 4, 1972
6. Labor Day : понедельник, сентябрь 4, 1972
7. Election Day : вторник, ноябрь 7, 1972
8. Veterans Day (observance) : пятница, ноябрь 10, 1972
9. Thanksgiving : четверг, ноябрь 23, 1972
10. Black Friday : пятница, ноябрь 24, 1972
11. Christmas : понедельник, декабрь 25, 1972

And here are the 4 public holidays falling on a weekend:

1. New Year's Day : суббота, январь 1, 1972
2. Veterans Day : суббота, ноябрь 11, 1972
3. Christmas Eve : воскресенье, декабрь 24, 1972
4. New Year's Eve : воскресенье, декабрь 31, 1972