References to “Martin Luther King Day” never includes his title Rev. I have mentioned him as Rev. Martin Luther King in letters to the editor of our daily paper, and they changed it to Dr. Martin Luther King. This man was an ordained minister, son of an ordained minister, but no reference to his main life’s vocation can be tolerated.
Columbus Day honored and celebrated Italian Americans. So much for diversity. I suspect “Presidents Day” may one day be refocused away from the 2 White males (one with slavery connections), to something like Founders Day, recognizing women equally. Memorial Day has already been generalized somewhat, to remembering all who have passed away.
Independence Day? That seems to imply rejection of the rest of the planet, being oblivious to Climate Change; it will be replaced by “Global Village Day” or the equivalent. Expect to see more and more articles in your paper against fireworks, which are militaristic, and reminiscent of Francis Scott Key, who is now evil. Easter will be morphed into “Creation Day”, caring for our planet, new beginnings and hope for all.
Flag Day? Not a major holiday, but it will morph into Fly Your Own Flag day, e. g. rainbow, or other country flag, etc. Thanksgiving? It will continue in some form, but someone will discover native people celebrated some thanksgiving type ceremony for the harvest, so it will be merged into that. (Thanksgiving was mostly a Protestant holiday until WW2; Catholics had their own special day in the pre Vatican II days for the Harvest, so this will be ironic.)
Veterans Day seems to be the most strongly defended holiday. They tried to move it to a certain Monday in November, and the vets got them to reverse that. Since they can’t eliminate the holiday in the near future, they will try to minimize any patriotic or religious elements.
Christmas? School districts already redefine this as Winter Holidays or Winter Break. Society can’t eliminate it entirely in the near future, but they may generalize it - hope for all, spring is coming, we are interdependent, etc.