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How many working days in year 1966?

Here is the detail of the calculation:

Because 1966 is not a leap year, it has 365 days.

Let's remove 53 saturdays and 52 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 1966.

Here is the list of these 9 public holidays:

1. Union of the Romanian Principalities : понедельник, 24 январь, 1966
2. Orthodox Easter Friday : пятница, 8 апрель, 1966
3. Orthodox Easter Monday : понедельник, 11 апрель, 1966
4. Pentecost Monday : понедельник, 30 май, 1966
5. Children's Day : среда, 1 июнь, 1966
6. Assumption : понедельник, 15 август, 1966
7. St. Andrew's Day : среда, 30 ноябрь, 1966
8. National Day : четверг, 1 декабрь, 1966
9. Boxing day : понедельник, 26 декабрь, 1966

And here are the 6 public holidays falling on a weekend:

1. New Year's Day : суббота, 1 январь, 1966
2. Second Day of the New Year : воскресенье, 2 январь, 1966
3. Orthodox Easter Sunday : воскресенье, 10 апрель, 1966
4. Labour Day : воскресенье, 1 май, 1966
5. Pentecost Sunday : воскресенье, 29 май, 1966
6. Christmas Day : воскресенье, 25 декабрь, 1966