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How many working days in year 2023?
Here is the detail of the calculation:
Because 2023 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 13 public holidays that do not fall during a weekend and we obtain 247 working days in 2023.
 Here is the list of these 13 public holidays: 
 
 1. New Year's Day (observance) : понеділок, 2 січень, 2023 
2. Coming of Age Day : понеділок, 9 січень, 2023 
3. Emperor's Birthday : четвер, 23 лютий, 2023 
4. Vernal Equinox Day : понеділок, 20 березень, 2023 
5. Constitution Memorial Day : середа, 3 травень, 2023 
6. Greenery Day : четвер, 4 травень, 2023 
7. Children's Day : п'ятниця, 5 травень, 2023 
8. Marine Day : понеділок, 17 липень, 2023 
9. Mountain Day : п'ятниця, 11 серпень, 2023 
10. Respect-for-Aged Day : понеділок, 18 вересень, 2023 
11. Health and Sports Day : понеділок, 9 жовтень, 2023 
12. Culture Day : п'ятниця, 3 листопад, 2023 
13. Labor Thanksgiving Day : четвер, 23 листопад, 2023 
And here are the 4 public holidays falling on a weekend:
1. New Year's Day : неділя, 1 січень, 2023 
2. Foundation Day : субота, 11 лютий, 2023 
3. Shōwa Day : субота, 29 квітень, 2023 
4. Autumnal Equinox Day : субота, 23 вересень, 2023