Определить период

...

How many working days in year 2105?

Here is the detail of the calculation:

Because 2105 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 9 public holidays that do not fall during a weekend and we obtain 252 working days in 2105.

Here is the list of these 9 public holidays:

1. New Year's Day : четверг, 1 январь, 2105
2. Australia Day : понедельник, 26 январь, 2105
3. Eight Hours Day : понедельник, 9 март, 2105
4. Good Friday : пятница, 3 апрель, 2105
5. Easter Monday : понедельник, 6 апрель, 2105
6. Easter Tuesday : вторник, 7 апрель, 2105
7. King's Birthday : понедельник, 8 июнь, 2105
8. Christmas Day : пятница, 25 декабрь, 2105
9. Boxing Day Observance : понедельник, 28 декабрь, 2105

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

1. Anzac Day : суббота, 25 апрель, 2105
2. Boxing Day : суббота, 26 декабрь, 2105