Определить период

...

How many working days in year 2121?

Here is the detail of the calculation:

Because 2121 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 2121.

Here is the list of these 7 public holidays:

1. New Year's Day : среда, 1 январь, 2121
2. New Year's Holiday : четверг, 2 январь, 2121
3. Orthodox Christmas Day : вторник, 7 январь, 2121
4. National Day Holiday : понедельник, 17 февраль, 2121
5. May Day : четверг, 1 май, 2121
6. May Day Holiday : пятница, 2 май, 2121
7. Armistice Day : вторник, 11 ноябрь, 2121

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

1. National Day : суббота, 15 февраль, 2121
2. National Day Holiday : воскресенье, 16 февраль, 2121