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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 52 sundays. It remains 262 days.

Now, let's remove 7 public holidays that do not fall during a weekend and we obtain 255 working days in 1956.

Here is the list of these 7 public holidays:

1. Pesach : вторник, 27 март, 1956
2. Shvi'i shel Pesach : понедельник, 2 апрель, 1956
3. Yom Ha-Atzmaut : понедельник, 16 апрель, 1956
4. Shavuot : среда, 16 май, 1956
5. Rosh Hashanah : четверг, 6 сентябрь, 1956
6. Sukkot : четверг, 20 сентябрь, 1956
7. Shemini Atzeret / Simchat Torah : четверг, 27 сентябрь, 1956

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

1. Rosh Hashanah : пятница, 7 сентябрь, 1956
2. Yom Kippur : суббота, 15 сентябрь, 1956