This means that there are many springs in a season. More beginning of spring refers to the phenomenon that there is more than one spring in a season, or that more than one spring begins in that year. 1924 is a year with too many beginning of spring and New Year's Eve in history. This is because the solar calendar was unified in 4500 BC, and the year was divided into 12 months. However, there are still some mathematical deviations that will lead to one more beginning of spring or one more New Year's Eve every four years.