To provide a water dome type calendar that enables a user to move a transparent container, thereby visually enjoying decoration pieces floating in a liquid, accommodated in the transparent container, and enables the user to easily replace a display piece, such as a calendar, accommodated in a dome type container such that the display piece can be replaced.

A water dome type calendar has a dome type transparent container, an upper portion of which is formed to be hemispherical and the inside of which is filled with transparent liquid, and inside the liquid, a large number of fine decoration pieces are accommodated. The water dome type calendar is provided with a frame member forming a slit with a predetermined width, downward from an opening formed in the upper part of the transparent container and in a state of being separated from a liquid in the transparent container. A display sheet such as a calendar is inserted from the opening of the slit so that it can be replaced.