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How many working days in year 2004?
Here is the detail of the calculation:
Because 2004 is a leap year, it has 366 days.
Let's remove 52 saturdays and 52 sundays. It remains 262 days.
Now, let's remove 14 public holidays that do not fall during a weekend and we obtain 248 working days in 2004.
 Here is the list of these 14 public holidays: 
 
 1. New Year's Day : четвер, 1 січень, 2004 
2. Coming of Age Day : понеділок, 12 січень, 2004 
3. Foundation Day : середа, 11 лютий, 2004 
4. Shōwa Day : четвер, 29 квітень, 2004 
5. Constitution Memorial Day : понеділок, 3 травень, 2004 
6. Greenery Day : вівторок, 4 травень, 2004 
7. Children's Day : середа, 5 травень, 2004 
8. Marine Day : понеділок, 19 липень, 2004 
9. Respect-for-Aged Day : понеділок, 20 вересень, 2004 
10. Autumnal Equinox Day : четвер, 23 вересень, 2004 
11. Health and Sports Day : понеділок, 11 жовтень, 2004 
12. Culture Day : середа, 3 листопад, 2004 
13. Labor Thanksgiving Day : вівторок, 23 листопад, 2004 
14. Emperor's Birthday : четвер, 23 грудень, 2004 
And here is the public holiday falling on a weekend:
1. Vernal Equinox Day : субота, 20 березень, 2004