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How many working days in year 2099?

Here is the detail of the calculation:

Because 2099 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 8 public holidays that do not fall during a weekend and we obtain 253 working days in 2099.

Here is the list of these 8 public holidays:

1. Pesach : воскресенье, 5 апрель, 2099
2. Yom Ha-Atzmaut : четверг, 23 апрель, 2099
3. Shavuot : понедельник, 25 май, 2099
4. Rosh Hashanah : вторник, 15 сентябрь, 2099
5. Rosh Hashanah : среда, 16 сентябрь, 2099
6. Yom Kippur : четверг, 24 сентябрь, 2099
7. Sukkot : вторник, 29 сентябрь, 2099
8. Shemini Atzeret / Simchat Torah : вторник, 6 октябрь, 2099

And here is the public holiday falling on a weekend:

1. Shvi'i shel Pesach : суббота, 11 апрель, 2099