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How many working days in year 1956?

Here is the detail of the calculation:

Because 1956 is a leap year, it has 366 days.

Let's remove 52 saturdays and 53 sundays. It remains 261 days.

Now, let's remove 10 public holidays that do not fall during a weekend and we obtain 251 working days in 1956.

Here is the list of these 10 public holidays:

1. Good Friday : пятница, 30 март, 1956
2. Easter Monday : понедельник, 2 апрель, 1956
3. Labour Day : вторник, 1 май, 1956
4. Liberation Day : вторник, 8 май, 1956
5. St Cyril and Methodius' Day : четверг, 5 июль, 1956
6. Jan Hus Day : пятница, 6 июль, 1956
7. St Wenceslas Day : пятница, 28 сентябрь, 1956
8. Christmas Eve : понедельник, 24 декабрь, 1956
9. Christmas Day : вторник, 25 декабрь, 1956
10. St. Stephen's Day : среда, 26 декабрь, 1956

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

1. Restoration Day of the Independent Czech State : воскресенье, 1 январь, 1956
2. Independence Day : воскресенье, 28 октябрь, 1956
3. Freedom and Democracy Day : суббота, 17 ноябрь, 1956