Определить период

...

How many working days in year 1969?

Here is the detail of the calculation:

Because 1969 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 8 public holidays that do not fall during a weekend and we obtain 253 working days in 1969.

Here is the list of these 8 public holidays:

1. New Year's Day : среда, 1 январь, 1969
2. Epiphany : понедельник, 6 январь, 1969
3. Good Friday : пятница, 4 апрель, 1969
4. Easter Monday : понедельник, 7 апрель, 1969
5. May Day : четверг, 1 май, 1969
6. Ascension Day : четверг, 15 май, 1969
7. Christmas Day : четверг, 25 декабрь, 1969
8. St Stephen's Day : пятница, 26 декабрь, 1969

And here are the 5 public holidays falling on a weekend:

1. Easter Sunday : воскресенье, 6 апрель, 1969
2. Whit Sunday : воскресенье, 25 май, 1969
3. Midsummer Day : суббота, 21 июнь, 1969
4. All Saints' Day : суббота, 1 ноябрь, 1969
5. Independence Day : суббота, 6 декабрь, 1969