In addition, some countries such as Japan and Thailand use a different system for counting years then in the west, which are based on historical events, and some dates in Asia are figured according to the lunar calender, which is almost unknown elsewhere. Many westerners consider the lunar calendar illogical, because every year has a different length, and therefore it seems useless as a unit of measurement; however, it may be of use to some people. Do you know any other counting years, or use different calendars?