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Autumn, also known as fall, [1] is one of the four temperate seasons on Earth. Outside the tropics, autumn marks the transition from summer to winter, in September (Northern Hemisphere) or March (Southern Hemisphere). Autumn is the season when the duration of daylight becomes noticeably shorter and the temperature cools considerably.
With the autumnal equinox, the sun crosses the celestial equator moving south, signifying the start of the colder months of the year for the Northern Hemisphere. (And the warmer months of the year ...
The winter solstice will be Saturday, Dec. 21, 2024, making late December the start of the winter months. What is the birthstone for September? Get to know the fall month's stunning gem.
The first day of fall this year, also known as the autumnal equinox is Sunday, Sept. 22. According to the Farmer's Almanac, the exact time of the autumnal equinox in the Northern Hemisphere is 8: ...
The Gregorian calendar, like the Julian calendar, is a solar calendar with 12 months of 28–31 days each. The year in both calendars consists of 365 days, with a leap day being added to February in the leap years. The months and length of months in the Gregorian calendar are the same as for the Julian calendar.
The Lunar Hijri calendar is a lunar calendar consisting of 12 months in a year of 354 or 355 days. The astronomer's mean tropical year , which is averaged over equinoxes and solstices, is currently 365.24219 days, slightly shorter than the average length of the year in most calendars.
Fall in northern Alaska brings the famous aurora borealis, or the northern lights, which can start in mid-September in the northernmost US state. A fall adventure to Denali National Park might ...
Due to seasonal lag, June, July, and August are the warmest months in the Northern Hemisphere while December, January, and February are the warmest months in the Southern Hemisphere. In temperate and sub-polar regions, four seasons based on the Gregorian calendar are generally recognized: spring, summer, autumn (fall), and winter.