Overview

• At the equinox, the sun sits directly above Earth’s equator and both poles are in sunlight, producing nearly equal day and night worldwide, according to NOAA and the National Weather Service.
• In the Northern Hemisphere, daylight will diminish each day after the equinox until the winter solstice on Dec. 21.
• Less than 24 hours beforehand, a new‑moon solar eclipse in Virgo occurs, with astrologers also pointing to Mars entering Scorpio and a Grand Air Trine as notable alignments.
• A partial lunar eclipse may be visible Monday in Antarctica, New Zealand, and a small part of Australia, depending on conditions.
• Aurora watchers often see increased activity around the equinox due to the Russell–McPherron effect, so forecasts from NOAA’s Space Weather Prediction Center bear watching.