Определить период

...

How many working days in year 1973?

Here is the detail of the calculation:

Because 1973 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 10 public holidays that do not fall during a weekend and we obtain 251 working days in 1973.

Here is the list of these 10 public holidays:

1. New Year's Day : понедельник, 1 январь, 1973
2. Maundy Thursday : четверг, 19 апрель, 1973
3. Good Friday : пятница, 20 апрель, 1973
4. Easter Monday : понедельник, 23 апрель, 1973
5. Labour Day : вторник, 1 май, 1973
6. Constitution Day : четверг, 17 май, 1973
7. Ascension Day : четверг, 31 май, 1973
8. Whit Monday : понедельник, 11 июнь, 1973
9. Christmas Day : вторник, 25 декабрь, 1973
10. St Stephen's Day : среда, 26 декабрь, 1973

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

1. Easter Sunday : воскресенье, 22 апрель, 1973
2. Pentecost : воскресенье, 10 июнь, 1973