When Is Autumn 2025 In Usa. Here's everything you should know about the fall equinox—plus our favorite fall facts, folklore, photos, and more! In 2025, these are the astronomical dates and times for the start of each season:
Seasons divide the year into four distinct periods of time named spring, summer, autumn/fall, and winter. Summer begins with the summer solstice, thursday, june 20, 2025, 4:51 p.m.