I've got an important question so if you could answer it quickly that would be greatI'm thinking of time travelling to tomorrow, so I can get my mayorship and the island. But if I do it will It affect my game? And what would happen if I turned back the clock back to today??
The only major downside to minor time traveling (i.e. skipping ahead a day or two) is weeds/wilting flowers, but this can be easily remedied with the Beautiful Town ordinance. Can't really say the same for major time traveling, though.
As for going backwards - to my understanding, it removes any progress you've made during that time. Kind of like going back and pressing the delete button and starting that day all over again. I can't really say whether or not it would majorly screw up your game, so I'd advise against it unless you simply stopped playing for a few days and wanted to go back and make up what you missed, or somethin'.