Is it cold on March 9th or April 9th?

It will be even colder if it is cold on March 9.

Three or nine days refers to the third "nine days" from winter to Sunday, that is, 19-27 days from winter to the future. On March 9, the ground receives less heat from the sun, so that the heat emitted at night exceeds the heat absorbed during the day. At this time, the heat stored on the ground has been exhausted, and the heat can't make ends meet, which leads to the gradual decline of the ground temperature and the cold weather. If there is cold air, the weather will become very cold.

Tips for keeping warm for three or nine days:

You can choose some aerobic exercise, such as yoga, or do aerobic exercise at home and keep warm for three or nine days. This kind of exercise is also conducive to improving immunity and expelling cold in the body. Massage the outside of the upper limb with your palm and rub it back and forth for 40 times until the skin feels slightly hot. The index finger and middle finger of both hands are slightly separated, and the root of the ear is rubbed up and down for 30 times, then the face is gently wiped with hands folded, paying attention to the light when touching the eyes.