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How many working days in year 1917?

Here is the detail of the calculation:

Because 1917 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 1917.

Here is the list of these 7 public holidays:

1. Yom Ha-Atzmaut : четверг, 26 апрель, 1917
2. Shavuot : воскресенье, 27 май, 1917
3. Rosh Hashanah : понедельник, 17 сентябрь, 1917
4. Rosh Hashanah : вторник, 18 сентябрь, 1917
5. Yom Kippur : среда, 26 сентябрь, 1917
6. Sukkot : понедельник, 1 октябрь, 1917
7. Shemini Atzeret / Simchat Torah : понедельник, 8 октябрь, 1917

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

1. Pesach : суббота, 7 апрель, 1917
2. Shvi'i shel Pesach : пятница, 13 апрель, 1917