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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) : понеділок, 2 січень, 2006 
2. January 2 (observance) : вівторок, 3 січень, 2006 
3. Coming of Age Day : понеділок, 9 січень, 2006 
4. Vernal Equinox Day : понеділок, 20 березень, 2006 
5. Constitution Memorial Day : середа, 3 травень, 2006 
6. Greenery Day : четвер, 4 травень, 2006 
7. Children's Day : п'ятниця, 5 травень, 2006 
8. Marine Day : понеділок, 17 липень, 2006 
9. Respect-for-Aged Day : понеділок, 18 вересень, 2006 
10. Health and Sports Day : понеділок, 9 жовтень, 2006 
11. Culture Day : п'ятниця, 3 листопад, 2006 
12. Labor Thanksgiving Day : четвер, 23 листопад, 2006 
And here are the 6 public holidays falling on a weekend:
1. New Year's Day : неділя, 1 січень, 2006 
2. Foundation Day : субота, 11 лютий, 2006 
3. Shōwa Day : субота, 29 квітень, 2006 
4. Autumnal Equinox Day : субота, 23 вересень, 2006 
5. Emperor's Birthday : субота, 23 грудень, 2006 
6. New Year's Eve : неділя, 31 грудень, 2006