Определить период

...

How many working days in year 1976?

Here is the detail of the calculation:

Because 1976 is a leap year, it has 366 days.

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

Now, let's remove 6 public holidays that do not fall during a weekend and we obtain 256 working days in 1976.

Here is the list of these 6 public holidays:

1. New Year's Day : четверг, 1 январь, 1976
2. National Sovereignty and Children's Day : пятница, 23 апрель, 1976
3. Commemoration of Atatürk, Youth and Sports Day : среда, 19 май, 1976
4. Victory Day : понедельник, 30 август, 1976
5. Republic Day Eve : четверг, 28 октябрь, 1976
6. Republic Day : пятница, 29 октябрь, 1976

And here is the public holiday falling on a weekend:

1. Labour and Solidarity Day : суббота, 1 май, 1976