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How many working days in year 1964?

Here is the detail of the calculation:

Because 1964 is a leap year, it has 366 days.

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

Now, let's remove 7 public holidays that do not fall during a weekend and we obtain 255 working days in 1964.

Here is the list of these 7 public holidays:

1. Yom Ha-Atzmaut : четверг, 16 апрель, 1964
2. Shavuot : воскресенье, 17 май, 1964
3. Rosh Hashanah : понедельник, 7 сентябрь, 1964
4. Rosh Hashanah : вторник, 8 сентябрь, 1964
5. Yom Kippur : среда, 16 сентябрь, 1964
6. Sukkot : понедельник, 21 сентябрь, 1964
7. Shemini Atzeret / Simchat Torah : понедельник, 28 сентябрь, 1964

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

1. Pesach : суббота, 28 март, 1964
2. Shvi'i shel Pesach : пятница, 3 апрель, 1964