Определить период

...

How many working days in year 2010?

Here is the detail of the calculation:

Because 2010 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 2010.

Here is the list of these 5 public holidays:

1. New Year's Day : пятница, 1 январь, 2010
2. Heritage Day : понедельник, 15 февраль, 2010
3. Good Friday : пятница, 2 апрель, 2010
4. Canada Day : четверг, 1 июль, 2010
5. Labour Day : понедельник, 6 сентябрь, 2010

And here is the public holiday falling on a weekend:

1. Christmas : суббота, 25 декабрь, 2010