What is the last day of winter?

Hello, the last day of winter should be the day before beginning of spring.

Beginning of spring, one of the 24 solar terms, is also called the Spring Festival, the First Month Festival, the New Year Festival and the New Year Festival. Standing means "start"; Spring represents warmth and growth. In ancient times, the method of "bucket handle Acupoint" used bucket handle and the Big Dipper in beginning of spring to point to Yin.

The current method of "fixing qi" divides solar terms, and beginning of spring is when the sun reaches longitude 3 15. In the era of cadres and branches, taking beginning of spring as the beginning of a year, beginning of spring means the beginning of a new cycle, the beginning of everything, and the meaning of all self-renewal.

The above is my personal suggestion, I hope it will help your problem.