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How many working days in year 1958?

Here is the detail of the calculation:

Because 1958 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 7 public holidays that do not fall during a weekend and we obtain 254 working days in 1958.

Here is the list of these 7 public holidays:

1. Yom Ha-Atzmaut : четверг, 24 апрель, 1958
2. Shavuot : воскресенье, 25 май, 1958
3. Rosh Hashanah : понедельник, 15 сентябрь, 1958
4. Rosh Hashanah : вторник, 16 сентябрь, 1958
5. Yom Kippur : среда, 24 сентябрь, 1958
6. Sukkot : понедельник, 29 сентябрь, 1958
7. Shemini Atzeret / Simchat Torah : понедельник, 6 октябрь, 1958

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

1. Pesach : суббота, 5 апрель, 1958
2. Shvi'i shel Pesach : пятница, 11 апрель, 1958