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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 8 public holidays that do not fall during a weekend and we obtain 252 working days in 1966.

Here is the list of these 8 public holidays:

1. Good Friday : пятница, 8 апрель, 1966
2. Easter Monday : понедельник, 11 апрель, 1966
3. St Cyril and Methodius' Day : вторник, 5 июль, 1966
4. Jan Hus Day : среда, 6 июль, 1966
5. St Wenceslas Day : среда, 28 сентябрь, 1966
6. Independence Day : пятница, 28 октябрь, 1966
7. Freedom and Democracy Day : четверг, 17 ноябрь, 1966
8. St. Stephen's Day : понедельник, 26 декабрь, 1966

And here are the 5 public holidays falling on a weekend:

1. Restoration Day of the Independent Czech State : суббота, 1 январь, 1966
2. Labour Day : воскресенье, 1 май, 1966
3. Liberation Day : воскресенье, 8 май, 1966
4. Christmas Eve : суббота, 24 декабрь, 1966
5. Christmas Day : воскресенье, 25 декабрь, 1966