Определить период

...

How many working days in year 1951?

Here is the detail of the calculation:

Because 1951 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 1951.

Here is the list of these 9 public holidays:

1. New Year's Day : понедельник, 1 январь, 1951
2. St. Patrick's Day (substitute day) : понедельник, 19 март, 1951
3. Easter Monday : понедельник, 26 март, 1951
4. Early May Bank Holiday : понедельник, 7 май, 1951
5. June Bank Holiday : понедельник, 4 июнь, 1951
6. Summer Bank Holiday : понедельник, 6 август, 1951
7. October Bank Holiday : понедельник, 29 октябрь, 1951
8. Christmas Day : вторник, 25 декабрь, 1951
9. St. Stephen's Day : среда, 26 декабрь, 1951

And here is the public holiday falling on a weekend:

1. St. Patrick's Day : суббота, 17 март, 1951