Universal time-piece

The utility model discloses a universal time clock belonging to the field of clocks. The utility model is realized by improving the existing clock. A clock disc of the utility model is a universal time twenty-four-hour clock disc with a calendar. A span shaft gear of a machine core of the utility model is engaged with a transmitting wheel piece. A driving shaft gear and the transmitting wheel piece are connected into a whole. The transmission shaft gear is engaged with a day-date calendar roller piece. A day-date calendar rolling shaft gear is connected with the day-date calendar roller piece into a whole. A day-date calendar side shaft gear is engaged with an hour wheel. The day-date calendar structure changes original fourteen week calendar wheel teeth into thirty-one date calendar wheel teeth and changes fourteen week calendar shaft sleeve holes into thirty-one date calendar shaft sleeve holes. The structure of the universal clock is reasonable. The time and the date of every area in the world can be simultaneously displayed.