The origin of Lunar New Year is too remote to be traced. It starts with the new moon on the first day of the new year and ends on the full moon 15 days later. On the 15th day of the new year, the Lantern Festival, is celebrated at night with lantern displays and lantern-carrying children taking part in a pa rade. The Chinese calendar is based on a combination of lu nar and solar movements. The lunar cycle is about 29.5 days. In order to 'catch up' with the solar calendar, the Chinese in sert an extra month once every few years (seven years out of a 19-year cycle). This is the same as adding an extra day to a leap year. This is why, according to the solar cal endar, the Lunar New Year falls on a different date each year. New Year's Eve and New Year's Day are celebrated as a family affair, a time of reunion and thanksgiving. The celebra tion is highlighted by a reli gious ceremony which honours heaven and earth, household gods and family ancestors. The sacrifice to the ances tors, the most important of all the rituals, unites the living members with those who have passed away. Departed relatives are re membered with respect be cause they were responsible for laying the foundations for the fortune and glory of the family.