How do auspicious days and some taboos on the calendar come from?

According to astrology, it is said that Qinglong, Tang Ming, Jingui, Tiande, Yutang, Siming and Six Stars are auspicious gods. Being on duty at six o'clock in the morning, everything is suitable, which is called "auspicious day of the ecliptic". A good day to do things. Another explanation comes from "in the Xuanzong period of the Tang Dynasty, there was a scholar named Jiri. When he was studying at school, he and Mr. Chen sat together, very friendly, and their feelings became deeper and deeper. At the age of 20, Ji Riyang's matchmaker went to the Chen family to talk about it. Seeing that Ji Ri was clever and honest, Chen agreed. Jiri was very happy when she heard the news. At this time, a Taoist priest came outside the door, who was a good friend of Jiri. Auspicious day invited the ecliptic to sit down in the living room and serve tea. The ecliptic said, "It's an auspicious day. Today is not a good day. The emperor's military forces are picking beautiful women and harming the people. You take Miss Chen out to hide for a few days. "The auspicious day didn't take it seriously, but it was a happy event. After a while, the sedan chair was carried, and before the bride could get off the sedan chair, the emperor's military forces came, dragging the bride away at once, and hurried forward to stop it, being beaten unconscious by officers and men. When the ecliptic saw it, he was very angry and hurried to save the bride. When the officers and men saw someone trying to get the bride back, they surrounded the ecliptic. The ecliptic desperately struggled with the officers and men to save the bride, but the ecliptic died of excessive blood loss. Everyone was so sad that they buried the ecliptic ceremoniously. A few years later, Jiri won the first prize in the exam. On this day, Emperor Xuanzong of the Tang Dynasty sent military forces to select beautiful women among the people. When Ji Ri knew it, he went to the Golden Hall to dissuade him. Xuanzong was furious and asked the samurai to push the auspicious day to the meridian gate and behead it. People buried him next to the tomb of the ecliptic to commemorate the auspicious day of the ecliptic and protect the people. Since then, people have held weddings in front of the tomb of the auspicious day of the ecliptic. After a long time, people will not go to the tomb on the auspicious day of the zodiac, but call the day when they die the auspicious day of the zodiac as a good day for marriage. "