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  2. March equinox - Wikipedia

    en.wikipedia.org/wiki/March_equinox

    The Persian calendar begins each year at the northward equinox, observationally determined at Tehran. [15] The Indian national calendar starts the year on the day next to the vernal equinox on 22 March (21 March in leap years) with a 30-day month (31 days in leap years), then has 5 months of 31 days followed by 6 months of 30 days. [15]

  3. Equinox - Wikipedia

    en.wikipedia.org/wiki/Equinox

    Vernal equinox and autumnal equinox: these classical names are direct derivatives of Latin (ver = spring, and autumnus = autumn). These are the historically universal and still most widely used terms for the equinoxes, but are potentially confusing because in the southern hemisphere the vernal equinox does not occur in spring and the autumnal ...

  4. First point of Aries - Wikipedia

    en.wikipedia.org/wiki/First_point_of_Aries

    The first point of Aries, also known as the cusp of Aries, is the location of the March equinox (the vernal equinox in the northern hemisphere, and the autumnal equinox in the southern), used as a reference point in celestial coordinate systems. In diagrams using such coordinate systems, it is often indicated with the symbol ♈︎.

  5. The science behind the vernal equinox [Video] - AOL

    www.aol.com/news/science-behind-vernal-equinox...

    The beginning of spring is known as the vernal equinox. Let's find out how it happens. Seasons change all the time. The changing of the seasons is either a solstice or an equinox. The beginning of ...

  6. Sidereal time - Wikipedia

    en.wikipedia.org/wiki/Sidereal_time

    More exactly, sidereal time is the angle, measured along the celestial equator, from the observer's meridian to the great circle that passes through the March equinox (the northern hemisphere's vernal equinox) and both celestial poles, and is usually expressed in hours, minutes, and seconds.

  7. The fall equinox is here. What does that mean? - AOL

    www.aol.com/news/fall-equinox-does-mean...

    The equinox arrives on Saturday, marking the start of the fall season for the Northern Hemisphere. Here's what to know about how we split up the year using the Earth's orbit. As the Earth travels ...

  8. Here's How Easter Sunday Is Determined Every Year - AOL

    www.aol.com/heres-easter-sunday-determined-every...

    In 2023, the vernal equinox falls on March 20, 2023, making the first full moon after that date April 6 and the following Sunday—April 9—Easter 2023. dtimiraos - Getty Images.

  9. Spring (season) - Wikipedia

    en.wikipedia.org/wiki/Spring_(season)

    At the spring equinox, also called the vernal equinox, days and nights are approximately twelve hours long, with daytime length increasing and nighttime length decreasing as the season progresses until the summer solstice. The spring equinox is in March in the Northern Hemisphere and in September in the Southern Hemisphere, while the summer ...