[[File:Clock.png|right]]
The '''day cycle''' is a period of 20 hours in game from 6am to 2am. Past midnight (12:00 am), the player's character becomes tired and in need of sleep. However, the [[The Player|the player]] can stay awake until 2am, after which their character will pass out.
If the character passes out they will wake up in bed, having been dragged there by either a [[JojaMart]] medical team, [[Linus]], or Dr. [[Harvey]] if they are not married to him. In each case 10% of the player's money up to and including 1000G {{price|1000}} will be lost (the details of this transaction will appear as a letter in the player's letter boxmailbox). An exception is if the player was lucky enough to pass out inside the house.
The game [[saves]] only after the [[The Player|the player]] has gone to sleep and the daily profit breakdown has been accepted, commencing the end of day.
Sleep will restore the player's [[Energy]] and [[Health]] to full if they go to bed no later than midnight and are not [[Energy|exhausted]], and to half if they pass out or are exhausted. The longer past midnight the player stays awake, the less energy they wake up with, with about 50% if they sleep right before 2am.