I predict that sometime in the next four years, the CBC will try to get Barack Obama’s birthday made into a national holiday. I think the largely GOP congress will roll over and allow it to happen, so fearful are they of being portrayed as racist.
If Trump signs it (50/50 bet there), then we can say that Presidents Day acknowledges the birth of all presidents EXCEPT Barack Obama who has his own holiday. Therefore, we can change Presidents Day to White Presidents Day.
And, over time, the CBC would then come back to remove White Presidents Day as “racist” so that Obama’s birthday is the only presidential birthday that is a national holiday (and he and Martin Luther King would be the only people with national holidays celebrating their birth with the possible exception of Jesus).
Future calendars would treat the 3rd Monday in February as just any other day but Obama’s Birthday in August would become a national day off.
Congress moved Washington's Birthday (a federal holiday) to the third Monday in February.
Nixon was President when the law was passed and called it "Presidents' Day," probably intending for it to honor both Washington and Lincoln--but Lincoln's Birthday had never been a federal holiday (just a state holiday in some Northern states). Nowadays it is treated as a holiday to honor all the Presidents. The Founding Fathers would not be happy with the idea of a day to celebrate our rulers, past and present.