This browser does not support the Video element.
ATLANTA - The question of when autumn or fall actually begins has long been a debate.
Most mark it at the autumnal equinox which is takes place 2:50 a.m. Saturday, but there are actually three different dates it begins depending on who is marking it on the calendar.
What is the autumnal equinox?
The simple answers to explain the autumnal equinox is the exact time the sun is directly over the Earth’s equator.
The means the Earth’s axis is tilted neither toward nor away from the sun.
It also marks the halfway point between the summer and winter solstices.
The exact time and date varies from year-to-year.
What is meteorological fall?
Meteorologists and climatologists actually consider Sept. 1 the beginning of autumn. It does not base the season on the Earth’s orientation with respect to the sun.
Climatological seasons are solely classified by the annual temperature cycle across the world.
This browser does not support the Video element.
This is because the astronomical seasons are based on the Earth’s position relative to the sun, while "climatological" or "meteorological" seasons are divided into three-month periods based on the temperatures that would be expected during each season.
Summer is the hottest time of year and winter, the coldest, so fall and spring, running in this instance from March 1 to May 31, are the three-month periods in between those two seasons.
What is solar autumn or Celtic fall?
This is falling a bit down a rabbit hole, but different traditions and cultures believe fall actually starts in early August and runs through the end of October or the first few days of November.
For instance, the traditional East Asian solar period starts around Aug. 8 and runs through Nov. 7.
This browser does not support the Video element.
Gaelic traditions have autumn lasting around the same period. In its native language, the words for September and October translate to "middle of autumn" and "end of autumn" respectively.
The Roman Empire believed autumn lasted from the third day before the Ides of Sextilis, roughly translated into "the sixth month of the year" or Aug. 11 to us, to the fifth day before the Ides of November, which is Nov. 9.
When do you celebrate the start of autumn?
Regardless of when autumn starts, the fall colors are what most people associate with the season. Well, that pumpkin spice-everything, and football.
This browser does not support the Video element.
This week, the FOX 5 Storm Team spotted the leaves beginning to change color in the north Georgia town of Dahlonega.
And this weekend, many fall festivals and attractions are opening.
We hope you have a great autumn season!