What's the difference between Spring Festival and beginning of spring?

Beginning of spring is not the Spring Festival.

Beginning of spring is not the Spring Festival. The Spring Festival is the first day of the Lunar New Year. On the first day of the first month of each year, it represents the end of the old calendar year and the beginning of a new year. Beginning of spring solar term is the first of the 24 solar terms and the first solar term in spring. After the solar term in beginning of spring, the climate changed from winter to spring, and the temperature began to rise slowly.