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How many working days in year 1952?

Here is the detail of the calculation:

Because 1952 is a leap year, it has 366 days.

Let's remove 52 saturdays and 52 sundays. It remains 262 days.

Now, let's remove 5 public holidays that do not fall during a weekend and we obtain 257 working days in 1952.

Here is the list of these 5 public holidays:

1. Pesach : четверг, 10 апрель, 1952
2. Shvi'i shel Pesach : среда, 16 апрель, 1952
3. Yom Ha-Atzmaut : среда, 30 апрель, 1952
4. Rosh Hashanah : воскресенье, 21 сентябрь, 1952
5. Yom Kippur : понедельник, 29 сентябрь, 1952

And here are the 4 public holidays falling on a weekend:

1. Shavuot : пятница, 30 май, 1952
2. Rosh Hashanah : суббота, 20 сентябрь, 1952
3. Sukkot : суббота, 4 октябрь, 1952
4. Shemini Atzeret / Simchat Torah : суббота, 11 октябрь, 1952