First Day Of Spring 2024 Events. The spring equinox (march 19, 2024) signals the start of spring in the northern hemisphere, the beginning of autumn in the southern hemisphere, and a rare moment. According to cbsnews.com, the first day of spring typically happens on march 19th, 20th, or 21st.
When is the first day of spring 2024, and what is the spring equinox? Arizona time on march 19.