Diary

Diaries are furniture items in, , and. When interacted with, a calendar appears that lists events and documents the days the player loaded their saved game. Diary entries can be written for each month of the year, and restrictions can be set to allow or restrict other players from viewing them. Diaries can only be interacted with when placed on a surface, such as a table, and they cannot be interacted with in.

A total of sixteen diaries are in the game, though they all function identically. They can be purchased from Nookway and Nookington's or received from Tortimer on New Year's Day. Diaries appear at the end of the furniture section of the catalog and can all be reordered. Additionally, each player has a in their house by default. If the player repeatedly attempts to read another player's locked diary, this may cause the game to crash.