When is the high tide?

The time of high tide is based on the lunar calendar: (the first and sixteenth days) Early tide: 0: 48; Late tide: 13: 12. (Grade 2 and 17) Early Tide:1:36; Late tide: 14:00. (3, 18) Early tide: 2: 24; Late tide: 14:48. (Grade 4, 19) Early Tide: 3:12; Late tide: 15:36. (fifth, twentieth) early tide: 4: 00; Late tide: 16:24. (sixth day, twenty-one) Early tide: 4: 48; Late tide: 17: 12.

(7, 22) Early tide: 5: 36; Late tide: 18:00. (8, 23) Early tide: 6: 24; Late tide: 18:48. (9th and 24th) Early Tide: 7:12; Late tide: 19:36.

Climax analysis

Tides are periodic fluctuations of seawater. Because it is tide during the day and sunseeker at night, the fluctuation of seawater during the day is called "tide" and the fluctuation of seawater at night is called "sunseeker". This phenomenon once puzzled the ancients and I don't know what caused it. Later, careful people found that the tide is delayed for a period of time every day, which is the same as the time when the moon is late every day, so the tide is inevitably related to the moon.

The relationship between tides and the moon is mentioned in China's ancient geography book Shan Hai Jing. Wang Chong clearly pointed out in the book "On Balance in the Eastern Han Dynasty" that "Tao rises and falls with the moon". But it was not until Newton discovered the law of universal gravitation that Laplace mathematically proved that tidal phenomena were indeed caused by the gravity of the sun and the moon, mainly the moon.