When Is The First Day Of Spring 2024 Usa Calendar. Summer begins with the summer solstice, thursday, june 20, 2024, 4:51 p.m. Fall begins with the autumnal equinox,.

The 2024 spring equinox occurred at exactly 11:06 p.m. Usually, it’s march 20 or 21, but because it’s a leap year and february gets an extra day, the.