The third lunar day of the year is Red Dog day according to Chinese Farmer's Calendar. Red Dog is the name of the God of Anger, who brings bad luck to people. So people don't like to go out on this day, otherwise they can lose temper easily and have argument with others. Actually, After 2-day celebrating, eating, drinking, playing, gambling, many people are tired and might get up very late. They said that if people want to work on this day, they won't get much progress. Therefore, the Red Dog day is a good excuse for people need a rest.
They also said that people should turn off the light and go to bed early, because the night is the Mice's Wedding Day and we shouldn't disturb them. The other saying is we want to make it dark, so mice have difficulty to making the wedding, which can slow down mice's breeding. In the old farmer society, people will leave a few of rice or cake in the corner of a room for the mice at night.
Anyway, to get up late and turn in early is for those people who were busy to prepare for Chinese New Year festival since last December have a chance to take a break.
Some people bring trash, which accumulates since Chinese New Year Eve, outside the house on this day. They said that's to sweep out the Poor Spirit from the house.