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Story summary
- The United Kingdom experiences the September equinox, marking astronomical autumn's start on 23 September 2026.
- The equinox occurs at 01:06 BST (08:05 p.m. EDT) on 23 September 2026.
- People gather at Stonehenge to watch the sunrise at the equinox.
- At the equinox the Sun crosses the celestial equator from north to south.
- Daylight exceeds 12 hours because atmospheric refraction and the Sun’s disc lengthen sunrise and sunset.
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