Clock

A clock is an item that shows the state of the daylight cycle in the Overworld. It spins randomly in dimensions that do not have daylight cycles.

The clock dial consists of two halves, a day side and a night side. The dial spins clockwise slowly to indicate the time of day, corresponding to the sun or moon's actual position in the sky. When the time of day changes suddenly, such as after sleeping or when /time is used, the clock dial spins rapidly to catch up. The player is able to sleep a few seconds after the clock shows exactly dusk.

The dial always shows the current in-game time when in the Overworld, regardless of where it appears. This includes a player's hand, an inventory slot, a crafting grid, an item frame, or even as a dropped item. For a clock to be mounted on a wall, an item frame is required.