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How many working days in year 2028?
Here is the detail of the calculation:
Because 2028 is a leap year, it has 366 days.
Let's remove 53 saturdays and 53 sundays. It remains 260 days.
Now, let's remove 10 public holidays that do not fall during a weekend and we obtain 250 working days in 2028.
 Here is the list of these 10 public holidays: 
 
 1. Martin Luther King Day : Monday, January 17, 2028 
2. Washington's Birthday : Monday, February 21, 2028 
3. Memorial Day : Monday, May 29, 2028 
4. Juneteenth National Independence Day : Monday, June 19, 2028 
5. Independence Day : Tuesday, July 4, 2028 
6. Labor Day : Monday, September 4, 2028 
7. Columbus Day : Monday, October 9, 2028 
8. Veterans Day (observance) : Friday, November 10, 2028 
9. Thanksgiving : Thursday, November 23, 2028 
10. Christmas : Monday, December 25, 2028 
And here are the 2 public holidays falling on a weekend:
1. New Year's Day : Saturday, January 1, 2028 
2. Veterans Day : Saturday, November 11, 2028