It’s been a tumultuous year of astrology thus far in 2025, but the autumn equinox on Sept. 22 — aka the first official day of fall — is ushering in a fresh cosmic vibe that’ll last the duration of this new season. While autumn will have its share of cosmic challenges too, there will be more bright spots than dark, so the luckiest day of fall 2025 isn’t one you’ll want to sleep on. On an astrological level, these three months of autumn are made up of Libra season, Scorpio season, and Sagittarius season. But perhaps its luckiest and most potent connection will be with passion-fueled planet Mars, which occurs at the end of October. Here’s why the Jupiter-Mars trine on Oct. 27 PT / Oct. 28 ET is sure to be one of the luckiest days of fall 2025.