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How many working days in year 2027?
Here is the detail of the calculation:
Because 2027 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 12 public holidays that do not fall during a weekend and we obtain 249 working days in 2027.
 Here is the list of these 12 public holidays: 
 
 1. New Year's Day : п'ятниця, січень 1, 2027 
2. Martin Luther King Day : понеділок, січень 18, 2027 
3. Memorial Day : понеділок, травень 31, 2027 
4. Juneteenth (observance) : п'ятниця, червень 18, 2027 
5. Independence Day (observance) : понеділок, липень 5, 2027 
6. Labor Day : понеділок, вересень 6, 2027 
7. Columbus Day : понеділок, жовтень 11, 2027 
8. Veterans Day : четвер, листопад 11, 2027 
9. Thanksgiving : четвер, листопад 25, 2027 
10. Black Friday : п'ятниця, листопад 26, 2027 
11. Christmas (observance) : п'ятниця, грудень 24, 2027 
12. New Year's Day (observance) : п'ятниця, грудень 31, 2027 
And here are the 3 public holidays falling on a weekend:
1. Juneteenth National Independence Day : субота, червень 19, 2027 
2. Independence Day : неділя, липень 4, 2027 
3. Christmas : субота, грудень 25, 2027