Animal Crossing New Leaf Ordinances. It gets me so fired up! The early bird and night owl extend the hours, not shift them.
In your new leaf town, you might want to lay down a few rules now that you're the mayor. The keep [town] beautiful ordinance keeps the town neat and tidy. Hubby thought night owl would be better but making the extra money in the beginning is so great.
You're only able to have one ordinance active at a time (which i believe isabelle states when you unlock the ability).
Now, not anybody can just make ordinances. The automatic bell dispenser, or abd, is an atm that is located in the post office of your acnl town. The keep [town] beautiful ordinance keeps the town neat and tidy. For example, if a player typically played late at night they could enact the night owl ordinance, which meant shops would stay open later and villagers would.