How many working days in year 2006?
Here is the detail of the calculation:
Because 2006 is not a leap year, it has 365 days.
Let's remove 52 saturdays and 53 sundays. It remains 260 days.
Now, let's remove 12 public holidays that do not fall during a weekend and we obtain 248 working days in 2006.
 Here is the list of these 12 public holidays: 
 
 1. New Year's Day (observance) : понедельник, январь 2, 2006 
2. Martin Luther King Day : понедельник, январь 16, 2006 
3. Washington's Birthday : понедельник, февраль 20, 2006 
4. Good Friday : пятница, апрель 14, 2006 
5. Memorial Day : понедельник, май 29, 2006 
6. Independence Day : вторник, июль 4, 2006 
7. Statehood Day : пятница, август 18, 2006 
8. Labor Day : понедельник, сентябрь 4, 2006 
9. Election Day : вторник, ноябрь 7, 2006 
10. Veterans Day (observance) : пятница, ноябрь 10, 2006 
11. Thanksgiving : четверг, ноябрь 23, 2006 
12. Christmas : понедельник, декабрь 25, 2006 
And here are the 4 public holidays falling on a weekend:
1. New Year's Day : воскресенье, январь 1, 2006 
2. Prince Jonah Kuhio Kalanianaole Day : воскресенье, март 26, 2006 
3. King Kamehameha I Day : воскресенье, июнь 11, 2006 
4. Veterans Day : суббота, ноябрь 11, 2006