Определить период

...

How many working days in year 1999?

Here is the detail of the calculation:

Because 1999 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 6 public holidays that do not fall during a weekend and we obtain 255 working days in 1999.

Here is the list of these 6 public holidays:

1. New Year's Day : пятница, 1 январь, 1999
2. Family Day : понедельник, 15 февраль, 1999
3. Good Friday : пятница, 2 апрель, 1999
4. Canada Day : четверг, 1 июль, 1999
5. Labour Day : понедельник, 6 сентябрь, 1999
6. Thanksgiving : понедельник, 11 октябрь, 1999

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

1. Easter Sunday : воскресенье, 4 апрель, 1999
2. Christmas : суббота, 25 декабрь, 1999
3. Boxing Day : воскресенье, 26 декабрь, 1999