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How many working days in year 1959?

Here is the detail of the calculation:

Because 1959 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 6 public holidays that do not fall during a weekend and we obtain 255 working days in 1959.

Here is the list of these 6 public holidays:

1. Purim : вторник, 24 март, 1959
2. Pesach : четверг, 23 апрель, 1959
3. Shvi'i shel Pesach : среда, 29 апрель, 1959
4. Yom Ha-Atzmaut : среда, 13 май, 1959
5. Rosh Hashanah : воскресенье, 4 октябрь, 1959
6. Yom Kippur : понедельник, 12 октябрь, 1959

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

1. Shavuot : пятница, 12 июнь, 1959
2. Rosh Hashanah : суббота, 3 октябрь, 1959
3. Sukkot : суббота, 17 октябрь, 1959
4. Shemini Atzeret / Simchat Torah : суббота, 24 октябрь, 1959