Solution facilitating determining time in any place on Earth by setting a chosen equatorial spot to any time, suitable for use, preferably as a school aid

摘要

the utility model is a device for determining local time and date of the previous day and the zonal and in any place on earth. the apparatus consists of a flat part (1) attached to the rings (2) and (3) the scale time and two discs (4) and (5) a geographical map or ground in sight from the poles.discs can be rotated manually tulejkami rings and retained terms imposed on the pins. by rotating discs and their attitude at the time can be determined at any time place and date of the previous and the next area.