It’s the birthday of the Jade Emperor, the King of Heaven on this day, as well.
The Jade Emperor is also known as the Yù Huáng or Yù Dì, the Ruler of all Heavens (of which the Chinese have over 30), Earth and the Underworld/ Hell, Creator of the Universe, later the Emperor of the Universe, and Lord of the Imperial Court.
According to Taoist legend, all the deities of the heaven and the earth will celebrate this day. And there will be grand ceremonies in Taoist temples on this day.
The Jade Emperor is one busy guy. I’d be very tired if I had to follow a holiday this long
The Haus of Dcaligari 