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How many working days in year 2123?

Here is the detail of the calculation:

Because 2123 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 5 public holidays that do not fall during a weekend and we obtain 256 working days in 2123.

Here is the list of these 5 public holidays:

1. New Year's Day : пятница, 1 январь, 2123
2. Orthodox Christmas Day : четверг, 7 январь, 2123
3. National Day : понедельник, 15 февраль, 2123
4. National Day Holiday : вторник, 16 февраль, 2123
5. Armistice Day : четверг, 11 ноябрь, 2123

And here are the 3 public holidays falling on a weekend:

1. New Year's Holiday : суббота, 2 январь, 2123
2. May Day : суббота, 1 май, 2123
3. May Day Holiday : воскресенье, 2 май, 2123