A moon phase display includes a frame and a plurality of display elements supported by the frame and rotatable relative to the frame. The plurality of display elements further includes a first side face on which an illuminated moon portion is depicted and a second side face. A first rotational position in which the first side face is arranged along a display plane wherein the first side faces together arranged on along the display plane represent a full moon. A second rotational position in which the second side face is arranged along the display plane. A drive rotates each of the plurality of display elements independently. A controller actuates the drive so that each one of the plurality of display elements is rotated into the second rotational position until all of the plurality of display elements are located in the second rotational position.

The timepiece drive device (100), notably for a system (300) for displaying time-based or time-derived information, in particular for an instantaneous-jump calendar system, includes an input mobile (10) which includes a first toothing (10a), a main wheel (11) which includes a second toothing (11a) only over part of the periphery of the main wheel, the second toothing being in meshing engagement with the first toothing, a cam (12) which is connected to the main wheel (11), notably connected to the main wheel (11) with minimum clearance, in particular fixed to the main wheel (11), and which has a cam profile (12a, 12b, 12c), a cam follower (21) which interacts with the profile (12a, 12b, 12c), and an energy accumulator (22) which elastically returns the cam follower against the profile (12a, 12b, 12c) of the cam (12).