Literally, it refers to a period of time after midnight and before Pingdan, that is, 1 until 3 o'clock after midnight, which is very ugly.
The word "ugly time" can be traced back to at least the Southern and Northern Dynasties. Written at the beginning of the 6th century AD, "On15th, the solar eclipse began in the northeast and lasted until the end of the child, and the color was ugly." The Book of Songs: "If you cry, you will be ignorant." It is said that in ancient times, the rooster announced the dawn and entered the DPRK. At this time, the cow finished eating grass and was ready to plow the field.
Time corresponding to twelve o'clock:
1, Zi (23: 00 midnight to 1: 00): In a day, Zi is the last moment of the day and the beginning of a new day.
2. Ugliness (65438+ 0 am to 3 am): Ugliness refers to the dark stage before dawn. It is said that this is the time when cows begin to plow at sunrise.
3. Yin (3:00 ~ 5:00 am): In a day, when the sky turns white, it is the moment when the tiger begins to move, so it belongs to the tiger in the zodiac.
4. Mao (5 am to 7 am): Mao is when the sun rises and begins to shine.
5. Morning (7:00-9:00 a.m.): Morning is a time when sunlight and heat increase. It is said that it is the time when the dragon goes west, so it belongs to the dragon in the zodiac.
6. Division (9: 00 a.m. to 1 1: 00 a.m.): At this time, the sun's light and heat are strong, and it belongs to the snake in the zodiac.
7. Noon (1 1 am to 13 am): In a day, the sunshine is the strongest.
8. Evening (13: 00 to 15: 00): In a day, evening is the time when the summer heat will disappear.
9. Shen (3: 00 p.m.-17: 00 p.m.): During the day, Shen's heat is almost over.
10, unitary (5: 00 pm to 19: 00 pm): In a day, unitary is the time when night is coming.
1 1, Xu (from 19: 00 to 2 1: 00 pm): In a day, it may be the night when the lights are on.
12, Hai (9: 00 pm to 23: 00 midnight): In a day, Hai is the end of the day, and it's time to move on to tomorrow.