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How many working days in year 1942?

Here is the detail of the calculation:

Because 1942 is not a leap year, it has 365 days.

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

Now, let's remove 5 public holidays that do not fall during a weekend and we obtain 256 working days in 1942.

Here is the list of these 5 public holidays:

1. Pesach : четверг, 2 апрель, 1942
2. Shvi'i shel Pesach : среда, 8 апрель, 1942
3. Yom Ha-Atzmaut : среда, 22 апрель, 1942
4. Rosh Hashanah : воскресенье, 13 сентябрь, 1942
5. Yom Kippur : понедельник, 21 сентябрь, 1942

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

1. Shavuot : пятница, 22 май, 1942
2. Rosh Hashanah : суббота, 12 сентябрь, 1942
3. Sukkot : суббота, 26 сентябрь, 1942
4. Shemini Atzeret / Simchat Torah : суббота, 3 октябрь, 1942