That will work until Elon Musk opens his Mars settlement. Then we will have to rename "Universal Coordinated Time" to "Earth Coordinated Time" and have separate "Planet Times".
I can't find it now, but I remember listening to an interview with a scientist involved with one of the Mars rovers who converted his whole family to Martian time for a few weeks or months after his rover landed, since those were the hours he was keeping for work.