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How many working days in year 1960?

Here is the detail of the calculation:

Because 1960 is a leap year, it has 366 days.

Let's remove 53 saturdays and 53 sundays. It remains 260 days.

Now, let's remove 7 public holidays that do not fall during a weekend and we obtain 253 working days in 1960.

Here is the list of these 7 public holidays:

1. Pesach : вторник, 12 апрель, 1960
2. Shvi'i shel Pesach : понедельник, 18 апрель, 1960
3. Yom Ha-Atzmaut : понедельник, 2 май, 1960
4. Shavuot : среда, 1 июнь, 1960
5. Rosh Hashanah : четверг, 22 сентябрь, 1960
6. Sukkot : четверг, 6 октябрь, 1960
7. Shemini Atzeret / Simchat Torah : четверг, 13 октябрь, 1960

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

1. Rosh Hashanah : пятница, 23 сентябрь, 1960
2. Yom Kippur : суббота, 1 октябрь, 1960