Определить период

...

How many working days in year 1998?

Here is the detail of the calculation:

Because 1998 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 1998.

Here is the list of these 10 public holidays:

1. New Year's Day : четверг, январь 1, 1998
2. Martin Luther King Day : понедельник, январь 19, 1998
3. Washington's Birthday : понедельник, февраль 16, 1998
4. Memorial Day : понедельник, май 25, 1998
5. Independence Day (observance) : пятница, июль 3, 1998
6. Labor Day : понедельник, сентябрь 7, 1998
7. Columbus Day : понедельник, октябрь 12, 1998
8. Veterans Day : среда, ноябрь 11, 1998
9. Thanksgiving : четверг, ноябрь 26, 1998
10. Christmas : пятница, декабрь 25, 1998

And here is the public holiday falling on a weekend:

1. Independence Day : суббота, июль 4, 1998