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Autumnal Equinox Marks First Day of Fall

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The autumnal equinox, also known as the fall equinox, occurred on Tuesday, September 22, at 8:05 p.m. ET, marking the first day of astronomical fall in the Northern Hemisphere. This event signifies that the Sun is directly over Earth's equator, making day and night approximately equal in length. However, due to atmospheric refraction, daylight extends beyond 12 hours for a few more days.

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22 Sources

  1. Azcentral avatar

    Azcentral

    X / Twitter / @azcentral

    The fall equinox, also known as the autumnal equinox, will occur today...

  2. AccuWeather avatar

    AccuWeather

    X / Twitter / @accuweather

    Hello, fall! 🍂🍁🎃 The autumnal equinox arrives at 8:05 p.m. ET, marking...

  3. Realitatea.md avatar

    Realitatea.md

    Telegram / @realitateamd

    Bună dimineața și un început de toamnă astronomică minunat! 🍂🍎 Astăzi...

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