Made the calculations myself, maybe others have some similar framework developed. But I don't know if there exist any formal timeframe for Mars. I wrote this proposal as a reaction on an article of a Professor of Washington Uni. Sent him a copy but got no reaction from him yet.

>> waht does this do to my birthday!!
Your Earth (I assume) birthday will be a different Mars day every time if you celibrate it once an earth year. If you were born on Mars you would have less
birthday parties (and less presents .

A friend who proofreaded the proposal came up with the question " and how about the other planets and moons?". I have no clue except that moons should follow the mother planet if that has a timeframe.

For liquid/gas planets like Jupiter it is very difficult to imagine a timeframe as every band has different orbit speed. For Jupiter the red spot could be used as reference. Different speeds give trouble with time zones. On earth we have the continental drifts but these are so slow that it will take a while before some country moves in a new timezone.

Rob Tillaart