To mass-produce a display element for a clock without producing any defect by providing a strip type plastic material sheet having a sufficient width dimension for producing at least one display element.

A display element 1 is a date disc. The disc is provided with a first outer ring 10 cut from a strip type plastic sheet along an outline line 20. In the outer ring 10, indications 8 about the date, to be more precise, numbers from 1 to 31 are attached. The disc 1 is provided with a second ring 11 formed below the first ring 10 adjacently to it. A recessed structure of the second ring 11 forms a space 12 for receiving a disc for a day of the week. The disc 1 is also provided with a third ring 13 constructed below the second ring 11 adjacently to it. For securing driving for the disc, an internal thread 16 is cut in the third ring 13. In this way, the disc 1 is provided with a step- shaped form having an outline formed by thermoforming. The thickness of a continuous steps 10, 11, 13 and teeth 14 is about 0.15 mm.