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Trees stop producing green chlorophyll, revealing underlying carotenoid and anthocyanin pigments.

Starts at the March equinox (March 20–21) and ends at the June solstice (June 20–21).

After exploring all the nuances, we return to our central question: ? The most widely accepted answer is:

Because Earth's orbit takes approximately 365.25 days, not exactly 365. The extra quarter-day causes the equinox and solstice to shift by about six hours each year, with a larger adjustment on leap years. That's why the autumnal equinox can fall on September 22 or 23.

To understand the progression of a traditional northern autumn, it helps to examine how the environment changes month by month. September: The Transition

The answer depends on who you ask—an astronomer, a meteorologist, or a cultural historian. While a standard calendar might point to a specific three-month block, the reality of autumn is far more nuanced. In this comprehensive guide, we will break down the official definitions, regional variations, and seasonal markers that actually determine when fall arrives and leaves.

According to this definition:

September is the "tug-of-war" month. In many regions, you’ll experience "Indian Summer"—stretches of lingering heat followed by the first cool evenings. This is the month of harvest festivals, the return of football, and the very first hints of color on the trees. October: Peak Autumn

Not every place experiences a classic fall. In tropical regions near the equator, there are no distinct seasons—just wet and dry cycles. In these areas, the question becomes largely irrelevant, as temperatures and daylight remain constant year-round.

🍂 In the Southern Hemisphere, fall (called autumn) occurs during March, April, and May for both definitions.

This reveal allows other underlying pigments, which were present all along, to shine through:

In Celtic tradition (still followed by modern Wiccans and Neopagans), autumn begins with the festival of (August 1) and ends with Samhain (October 31 or November 1). According to this system, the autumn months are August, September, and October—a slightly earlier definition than the meteorological one.

Fall foliage tourism is a multi-billion dollar industry. Peak colors occur at different times depending on latitude and elevation. In the US Northeast, for example:

In Chinese astronomy and traditional calendars, autumn spans the months of July, August, and September on the lunar calendar? Actually, it's more complex. The traditional Chinese lunisolar calendar divides the year into 24 solar terms. Autumn includes six solar terms:

Both are correct, depending on the definition. September 1 is meteorological fall; September 22/23 is astronomical fall. There’s no universal rule – choose the one that suits your purpose.

The Fall - What Months Are

The Fall - What Months Are

Trees stop producing green chlorophyll, revealing underlying carotenoid and anthocyanin pigments.

Starts at the March equinox (March 20–21) and ends at the June solstice (June 20–21).

After exploring all the nuances, we return to our central question: ? The most widely accepted answer is:

Because Earth's orbit takes approximately 365.25 days, not exactly 365. The extra quarter-day causes the equinox and solstice to shift by about six hours each year, with a larger adjustment on leap years. That's why the autumnal equinox can fall on September 22 or 23. what months are the fall

To understand the progression of a traditional northern autumn, it helps to examine how the environment changes month by month. September: The Transition

The answer depends on who you ask—an astronomer, a meteorologist, or a cultural historian. While a standard calendar might point to a specific three-month block, the reality of autumn is far more nuanced. In this comprehensive guide, we will break down the official definitions, regional variations, and seasonal markers that actually determine when fall arrives and leaves.

According to this definition:

September is the "tug-of-war" month. In many regions, you’ll experience "Indian Summer"—stretches of lingering heat followed by the first cool evenings. This is the month of harvest festivals, the return of football, and the very first hints of color on the trees. October: Peak Autumn

Not every place experiences a classic fall. In tropical regions near the equator, there are no distinct seasons—just wet and dry cycles. In these areas, the question becomes largely irrelevant, as temperatures and daylight remain constant year-round.

🍂 In the Southern Hemisphere, fall (called autumn) occurs during March, April, and May for both definitions. The most widely accepted answer is: Because Earth's

This reveal allows other underlying pigments, which were present all along, to shine through:

In Celtic tradition (still followed by modern Wiccans and Neopagans), autumn begins with the festival of (August 1) and ends with Samhain (October 31 or November 1). According to this system, the autumn months are August, September, and October—a slightly earlier definition than the meteorological one.

Fall foliage tourism is a multi-billion dollar industry. Peak colors occur at different times depending on latitude and elevation. In the US Northeast, for example: To understand the progression of a traditional northern

In Chinese astronomy and traditional calendars, autumn spans the months of July, August, and September on the lunar calendar? Actually, it's more complex. The traditional Chinese lunisolar calendar divides the year into 24 solar terms. Autumn includes six solar terms:

Both are correct, depending on the definition. September 1 is meteorological fall; September 22/23 is astronomical fall. There’s no universal rule – choose the one that suits your purpose.