Is the movement solar or lunar?

Lunar calendar! In fact, there are three Halloween festivals: Tomb-Sweeping Day, July 15,1the first day of October, and July 15 as you said. According to legend, from July 1st every year, Yan ordered to open the gates of hell, so that ghosts who suffered and were imprisoned in hell all the year round could get out of hell, get a short vagrant and enjoy human blood and food. Therefore, people call July a ghost month and think it is an unlucky month, neither getting married nor eating. Every year, the fifteenth day of the seventh lunar month is the Yulan Festival, also known as the Mid-Yuan Festival, Magu Festival, July 30th or Ghost Festival. In the past, people would prepare some dishes, wine, rice, gold and silver clothes and paper on this night to worship ghosts and gods at the intersection.