How many days are there between the winter solstice and the beginning of spring?

45 days apart, the winter solstice is followed by Minor Cold, Major Cold, and Beginning of Spring. Every 15 days is a solar term; the annual movement track of the sun is divided into 24 equal parts, and every 15° is an equal part. It is a solar term, starting from the beginning of spring and ending with the great cold, and it starts over and over again.

Each solar term represents different changes in climate, phenology, and time. The Chinese lunar calendar is a lunisolar calendar, which is based on the movement of the sun and the moon. Therefore, adding the twenty-four solar terms can better reflect the cycle of the sun.

It is a knowledge system formed by observing the annual movement of the sun and understanding the changes in seasons, climate, phenology and other aspects throughout the year.

Extended information:

The solar terms that reflect the changes in the four seasons are: the beginning of spring, the vernal equinox, the beginning of summer, the summer solstice, the beginning of autumn, the autumnal equinox, the beginning of winter, and the winter solstice. Among them, the beginning of spring, the beginning of summer, the beginning of autumn, and the beginning of winter are collectively called "Four Lis", which means the beginning of the four seasons.

There are five solar terms that reflect temperature changes: minor heat, major heat, extreme heat, minor cold, and major cold.

There are seven solar terms that reflect weather phenomena: rain, Grain Rain, white dew, cold dew, frost, light snow, and heavy snow. There are four solar terms that reflect phenological phenomena: Jingzhe, Qingming, Xiaoman, and Eawn.

Reference: Baidu Encyclopedia--Solar Terms