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How many working days in year 1978?

Here is the detail of the calculation:

Because 1978 is not a leap year, it has 365 days.

Let's remove 52 saturdays and 53 sundays. It remains 260 days.

Now, let's remove 9 public holidays that do not fall during a weekend and we obtain 251 working days in 1978.

Here is the list of these 9 public holidays:

1. New Year's Day (observance) : понедельник, январь 2, 1978
2. Memorial Day : понедельник, май 29, 1978
3. Juneteenth National Independence Day : понедельник, июнь 19, 1978
4. Independence Day : вторник, июль 4, 1978
5. Labor Day : понедельник, сентябрь 4, 1978
6. Columbus Day : понедельник, октябрь 9, 1978
7. Veterans Day (observance) : пятница, ноябрь 10, 1978
8. Thanksgiving : четверг, ноябрь 23, 1978
9. Christmas : понедельник, декабрь 25, 1978

And here are the 2 public holidays falling on a weekend:

1. New Year's Day : воскресенье, январь 1, 1978
2. Veterans Day : суббота, ноябрь 11, 1978