Определить период

...

How many working days in year 1997?

Here is the detail of the calculation:

Because 1997 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 1997.

Here is the list of these 8 public holidays:

1. New Year's Day : среда, 1 январь, 1997
2. Good Friday : пятница, 28 март, 1997
3. Easter Monday : понедельник, 31 март, 1997
4. Labour Day : четверг, 1 май, 1997
5. Establishment Day : вторник, 1 июль, 1997
6. National Day : среда, 1 октябрь, 1997
7. Christmas Day : четверг, 25 декабрь, 1997
8. Boxing Day : пятница, 26 декабрь, 1997

And here is the public holiday falling on a weekend:

1. Holy Saturday : суббота, 29 март, 1997