World time converter for analog clock

摘要

A simple tool to know local time around the world that is applicable to analog watches or clocks. A transparent sticker with world major city marks printed converts an ordinary clock to a world clock only by being attached on the face of a clock. The sticker is attached according to a rule that the standard time city mark comes to the 12 o'clock position. On the sticker sheet, other city marks are aligned along a circumference according to their time differences based on their global geographical location. A transparent clock dial with a marker at 12 o'clock position serves the same function. The dial is placed over the clock face in such a manner the marker comes to the designated position according the city whose local time is wanted. The short hand is read according to the overlaid clock dial. A chart can be used to know where the marker should be placed.