Time Traveling is a cheat in the series. In order to time travel, you go to either the starting menu or attic. If you are in the attic, click on the phone and click "set the time". If you are getting logged in by a character, click "options" and then "set the time". If you are playing Animal Crossing, click "other things", then set the clock. Now you can time travel, and get faster house upgrades, trees growing, faster store upgrades, public works projects faster, more fossil holes, and money.
'!NOTE!: TIME TRAVELING TOO MUCH AT ONCE MAY CAUSE BUGS IN YOUR HOME, VILLAGERS LEAVING AND COMING, 'DEAD FLOWERS, AND WEEDS IN THE TOWN!