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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 5 public holidays that do not fall during a weekend and we obtain 256 working days in 1999.

Here is the list of these 5 public holidays:

1. New Year's Day : пятница, 1 январь, 1999
2. Heritage 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

And here is the public holiday falling on a weekend:

1. Christmas : суббота, 25 декабрь, 1999