Black History Month, as we know it, began in 1976 and has been recognized by every American president since. The event is an outgrowth of Negro History Week which began in 1926.
I don’t know if Trump has acknowledged the month yet but I find it interesting that this may be the first such event taking place during the term of a president with known racial biases.
Don’t forget that Trump is the guy who paid mention to Holocaust Week without using the word Jew. He’s also the guy that KKK leader David Duke, and many other white supremacists think is doing great.