Is there any way to speed up time in Animal Crossing?

I am currently building my first house (just paid the downpayment) and waiting a full day to start designing my house is too long. Is there a way to speed it up?

Yes. It is known as Time-Travelling. It has some real benefits if you want to access different events/seasons/upgrades during the game, throughout the year.

There are two methods to do this. You can either adjust your 3DS clock, or adjust the in-game clock.

Select the method that best suits you and adjust the time/date accordingly:

1. On your 3DS, go to:

   System Settings > Other Settings > Date & Time > Today's Date or current Time.

2. In the Game, on main menu, go to:

   Continue > Select your "username" > "I need help first..." > "Set the date/time".

Beware, if you start time-travelling too much, you may miss villagers moving in and out, flowers/hybrids may become lost and you might find your town has more weeds than normal. Also, if you choose the 1st option, beware that adjusting your 3DS clock may have affects on your other games and applications.