In 2026, the autumnal equinox in the Northern Hemisphere, including Madeira, will take place on September 23rd. The astronomical phenomenon is scheduled for 01:05 local time.
This event officially signals the beginning of autumn, occurring when the Sun crosses the celestial equator. The word "equinox" originates from Latin, meaning "equal night," referring to the roughly 12-hour periods of daylight and darkness. However, precise duration can vary slightly due to atmospheric refraction and the Sun's apparent size.
Typically, the autumnal equinox in the Northern Hemisphere falls between September 22nd and 23rd, signifying the transition from summer to autumn. In the Southern Hemisphere, the equivalent event happens in March.
