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How many working days in year 1975?

Here is the detail of the calculation:

Because 1975 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 1975.

Here is the list of these 6 public holidays:

1. New Year's Day : среда, 1 январь, 1975
2. Heritage Day : понедельник, 17 февраль, 1975
3. Good Friday : пятница, 28 март, 1975
4. Canada Day : вторник, 1 июль, 1975
5. Labour Day : понедельник, 1 сентябрь, 1975
6. Christmas : четверг, 25 декабрь, 1975