Beginning of Spring is the first of the 24 solar terms, marking the beginning of spring. The ancient people's method of calculating the beginning of spring was mainly based on astronomical observation, especially the position of the sun and the length of day and night.
In ancient China, the time of solar terms was determined by observing the position of the sun and the length of the shadow. In the solar term of the beginning of spring, the ancients would observe whether the sun passed 315 degrees of longitude (the position of the sun on the ecliptic). When the sun passes through 315 degrees of longitude, it is considered as the beginning of spring.
The ancients also observed the length of the shadow to determine the beginning of spring. On the first day of spring, the ancients would judge by observing the length of the figure at noon. If the length of the shadow is shorter than the previous day, it is considered that the beginning of spring has arrived.
Although these observation methods are relatively simple, they were effective ways to accurately measure solar terms in ancient times. With the passage of time, people have developed more accurate astronomical measurement tools and methods, such as modern astronomical observation and calculation methods, which can more accurately determine the time point of the solar term.
Modern China adopts the method of combining astronomy and meteorology to determine the solar term time. Through the observation and calculation of the sun, earth, atmosphere and other factors, the specific time point of the 24 solar terms can be predicted and determined. These methods enable people to more accurately understand the arrival of solar terms and adapt to natural changes.
