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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 10 public holidays that do not fall during a weekend and we obtain 250 working days in 1972.

Here is the list of these 10 public holidays:

1. Good Friday : пятница, 31 март, 1972
2. Easter Monday : понедельник, 3 апрель, 1972
3. Labour Day : понедельник, 1 май, 1972
4. Liberation Day : понедельник, 8 май, 1972
5. St Cyril and Methodius' Day : среда, 5 июль, 1972
6. Jan Hus Day : четверг, 6 июль, 1972
7. St Wenceslas Day : четверг, 28 сентябрь, 1972
8. Freedom and Democracy Day : пятница, 17 ноябрь, 1972
9. Christmas Day : понедельник, 25 декабрь, 1972
10. St. Stephen's Day : вторник, 26 декабрь, 1972

And here are the 3 public holidays falling on a weekend:

1. Restoration Day of the Independent Czech State : суббота, 1 январь, 1972
2. Independence Day : суббота, 28 октябрь, 1972
3. Christmas Eve : воскресенье, 24 декабрь, 1972