In this way the time of the fall equinox constantly shifts back and forth so it always stays between September 21 and 24. In a non-leap year, the moment of the fall equinox is about 5 hours 49 minutes after that moment in the previous year (in UTC), and in a leap year it is about 18 hours 11 minutes before that moment in the previous year, as can be seen in this graph. X axis (bottom, horizontal): Calendar years, Y axis (left, vertical): day in September (21 to 23). Graph demonstrating the movement (caused by leap shifting) of the exact moment of the fall equinox between 19. The exact moment of the fall equinox through the centuries At all other times the length of day and night will be different. On the day of an equinox, day and night are of approximately equal length all over the world, as the Earth's rotational axis is neither tilted away from nor towards the Sun. The word 'equinox' is derived from Latin and means 'equal night'. The other days are the spring equinox (beginning of spring), the summer solstice (beginning of summer) and the winter solstice (beginning of winter). The fall equinox is one of four days with solar events (two equinoxes and two solstices) throughout the year that mark the beginning of a new season. To find out the exact date and time of the fall equinox 2023 in your area use this seasons calculator. For locations that are ahead of UTC (further east) it may fall on the day after, and for locations that are behind UTC (further west) it may fall on the day before. While the fall equinox occurs at the same moment in time all over the world, the date and local time differ from place to place depending on the year and a location's time zone. The dates given on this page are based on Coordinated Universal Time (UTC), which for practical purposes is equivalent to Greenwich Mean Time (GMT - the time zone of the United Kingdom). In the Northern Hemisphere the fall equinox occurs every year between September 21 and 24. For the Northern Hemisphere, the fall equinox is the moment when summer ends and fall ( autumn) begins, while for the Southern Hemisphere it is the moment when winter ends and spring begins. An equinox is the moment in time (not a day-long event) when the Sun stands directly above the equator and day and night are of approximately equal length.

The fall equinox marks the beginning of fallįall equinox is another name for the equinox also known as autumn equinox and September equinox.

Equinox fall 2017