The present invention relates to a date display cap for a medicine bottle, which includes: an outer cap (10, 110) configured to be rotated forwardly or reversely by a user and having a display window (11, 111) an inner cap (20, 120) having a screw unit (20a, 120a) screw-coupled to a mouth (B1) of a medicine bottle (B) on an inner peripheral surface thereof and rotatably installed at an inside of the outer cap (10, 110) and a date display unit (30, 130) installed between the outer cap (10, 110) and the inner cap (20, 120), for displaying a changed date through the display window (11, 111) when the outer cap (10, 110) is rotated forwardly and reversely with respect to the inner cap (20, 120).
