2. The selection and arrangement of the zodiac is based on the corresponding relationship between animal habits and time. In ancient times, the twelve hours of a day were recorded by the twelve branches, that is, the ugly son Yin Mao Tatsumi didn't confess at noon. At night 1 1 in the morning 1 is midnight, when people find that mice are the most active; 65438+ 0 am to 3 am, ugly, cows are ruminating; From 3: 00 to 5: 00, when Yin Shi called, the tiger began to wander around for food, the fiercest? At the same time, the earthly branches match the heavenly stems, which was used to indicate the order of the years in the old society. Therefore, the rats, cows, tigers, rabbits, dragons, snakes, horses, sheep, monkeys, chickens, dogs and pigs corresponding to the twelve earthly branches naturally became the zodiac of that year.