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How many working days in year 2097?
Here is the detail of the calculation:
Because 2097 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 13 public holidays that do not fall during a weekend and we obtain 248 working days in 2097.
 Here is the list of these 13 public holidays: 
 
 1. New Year's Day : вівторок, 1 січень, 2097 
2. Coming of Age Day : понеділок, 14 січень, 2097 
3. Foundation Day : понеділок, 11 лютий, 2097 
4. Vernal Equinox Day : середа, 20 березень, 2097 
5. Shōwa Day : понеділок, 29 квітень, 2097 
6. Constitution Memorial Day : п'ятниця, 3 травень, 2097 
7. Children's Day (observance) : понеділок, 6 травень, 2097 
8. Marine Day : понеділок, 15 липень, 2097 
9. Mountain Day (observance) : понеділок, 12 серпень, 2097 
10. Respect-for-Aged Day : понеділок, 16 вересень, 2097 
11. Autumnal Equinox Day : понеділок, 23 вересень, 2097 
12. Health and Sports Day : понеділок, 14 жовтень, 2097 
13. Culture Day (observance) : понеділок, 4 листопад, 2097 
And here are the 6 public holidays falling on a weekend:
1. Emperor's Birthday : субота, 23 лютий, 2097 
2. Greenery Day : субота, 4 травень, 2097 
3. Children's Day : неділя, 5 травень, 2097 
4. Mountain Day : неділя, 11 серпень, 2097 
5. Culture Day : неділя, 3 листопад, 2097 
6. Labor Thanksgiving Day : субота, 23 листопад, 2097