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Autumn (also known as Fall in North American English) is one of the four temperate seasons. Autumn marks the transition from summer into winter. In the northern hemisphere, the start of autumn is generally considered to be around September and in the southern hemisphere, its beginning is considered to be around March. There exists however a number of different definitions of autumn some of which are based on the months of the year while others are based on the equinox and solstice.^[1]

Around this time, deciduous trees shed their leaves, with the leaves changing to a reddish or brownish hue before falling. Such coloured leaves have come to be colloquially called "fall foliage". In temperate zones, autumn is the season during which most crops are harvested. It is also the season during which days get shorter and cooler, the nights get longer, and precipitation gradually increases (in some parts of the world).

The word 'autumn' is derived from the French word "automne", and became popular in usage for the season since the 16th century. The North American name for the season, 'fall', probably derived as a contraction of the phrase "fall of the leaves".

Contents 1 Definitions 2 Etymology 3 Historic usage 4 In popular culture 4.1 Harvest association 4.2 Melancholy association 4.3 Other associations 5 Tourism 6 See also 7 References 8 External links

Astronomically, some Western countries consider autumn to begin with the autumnal equinox (around September 23 in the northern hemisphere and March 21 in the southern hemisphere) and end with the winter solstice (around December 21 in the northern hemisphere and June 21 in the southern hemisphere).^[1] Such conventions are by no means universal, however. In Chinese astronomy, for example, the autumnal equinox marks the middle of autumn, which is deemed to have begun around the time of Liqiu (around August 7).

Other definitions are based on counting entire months. Meteorologists, for example, count March, April and May in the southern hemisphere, and September, October, and November in the northern hemisphere as autumn,^[1] while in the Irish Calendar, which still follows the Celtic cycle, autumn is counted as the whole months of August, September and October.

Although the days begin to shorten after the summer solstice, it is usually in September (northern hemisphere) or March (southern hemisphere) when the arrival of night becomes noticeably earlier.

The word autumn comes from the Old French word autompne (automne in modern French), and was later normalized to the original Latin word autumnus.^[2] There are rare examples of its use as early as the 14th century, but it became common only in the 16th, around the same time as fall, and the two words appear to have been used interchangeably.

Before the 16th century harvest was the term usually used to refer to the season. However as more people gradually moved from working the land to living in towns (especially those who could read and write, the only people whose use of language we now know), the word harvest lost its reference to the time of year and came to refer only to the actual activity of reaping, and fall and autumn began to replace it as a reference to the season.

The alternative word fall is now mostly a North American English word for the season. It traces its origins to old Germanic languages. The exact derivation is unclear, the Old English fiæll or feallan and the Old Norse fall all being possible candidates. However, these words all have the meaning "to fall from a height" and are clearly derived either from a common root or from each other. The term only came to denote the season in the 16th century, a contraction of Middle English expressions like "fall of the leaf" and "fall of the year".

During the 17th century, English immigration to the colonies in North America was at its peak and the new settlers took their language with them. While the term fall gradually obsolesced in Britain, it became the more common term in North America, where autumn is nonetheless preferred in scientific and, often, literary contexts.

Many ancient civilizations (such as the Amerindians and the ancient Hebrews) computed the years by autumns,^[3][4] while the Anglo-Saxons did so by winters. Tacitus tells us that the ancient Germans were acquainted with all the other seasons of the year, but had no notion of autumn — though this is likely to be wrong, especially as a blanket statement (Tacitus wrote about Germanic tribes without firsthand knowledge, and thus promoted myths as well as actual information). Linwood observed of the beginning of the several seasons of the year, that:

"Dat Clemens Hyemem, dat Petrus Ver Cathedratus;

Aestuat Urbanus, Autumnat Bartholomaeus."^[5]

In alchemy, autumn is the time or season when the operation of the Philosopher's stone is brought to maturity and perfection.^[5] It is also symbolised by the Metal element in Chinese astrology.

Autumn's association with the transition from warm to cold weather, and its related status as the season of the primary harvest, has dominated its themes and popular images. In Western cultures, personifications of autumn are usually pretty, well-fed females adorned with fruits, vegetables and grains and wheat that ripen at this time. Most ancient cultures featured autumnal celebrations of the harvest, often the most important on their calendars. Still extant echoes of these celebrations are found in the mid-autumn Thanksgiving holiday of the United States, and the Jewish Sukkot holiday with its roots as a full moon harvest festival of "tabernacles" (huts wherein the harvest was processed and which later gained religious significance). There's also the many North American Indian festivals tied to harvest of autumnally ripe foods gathered in the wild, the Chinese Mid-Autumn or Moon festival, and many others. The predominant mood of these autumnal celebrations is a gladness for the fruits of the earth mixed with a certain melancholy linked to the imminent arrival of harsh weather.

This view is presented in Keats' poem To Autumn where he describes the season as a time of bounteous fecundity, a time of 'mellow fruitfulness'.

Autumn in poetry has often been associated with melancholy. The possibilities of summer are gone, and the chill of winter is on the horizon. Skies turn grey, and people turn inward, both physically and mentally.^[6] Rainer Maria Rilke, a famous German-language poet, has expressed such sentiments in one of his most famous poems, Herbsttag (Autumn Day), which reads in part:

Wer jetzt kein Haus hat, baut sich keines mehr.

Wer jetzt allein ist, wird es lange bleiben,

wird wachen, lesen, lange Briefe schreiben

und wird in den Alleen hin und her

unruhig wandern, wenn die Blätter treiben.

This translates roughly (there is no official translation) to:

Who now has no house, will not build one (anymore).

Who now is alone, will remain so for long,

will wake, and read, and write long letters

and back and forth on the boulevards

will restlessly wander, while the leaves blow.

Similar examples may be found in Yeats' poem The Wild Swans at Coole where the maturing season that the poet observes symbolically represents his own ageing self. Like the natural world that he observes he too has reached his prime and now must look forward to the inevitability of old age and death. Paul Verlaine's "Chanson d'automne" ("Autumn Song") is likewise characterized by strong, painful feelings of sorrow.

In the US, autumn is also associated with the Halloween season (which in turn was influenced by Samhain, a Celtic autumn festival),^[7] and with it a widespread marketing campaign that promotes it. The television, film, book, costume, home decoration, and confectionery industries use this time of year to promote products closely associated with such holiday, with promotions going from early September to 31 October, since their themes rapidly lose strength once the holiday ends, and advertising starts concentrating on Christmas.

Although colour change in leaves occurs wherever deciduous trees are found, coloured autumn foliage is most famously noted in two regions of the world: most of Canada and the United States; and Eastern Asia, including China, Korea, and Japan. It can also be very significant in Australia and New Zealand, but not to the same degree.

Eastern Canada and the New England region of the United States are famous for the brilliance of their "fall foliage", and a seasonal tourist industry has grown up around the few weeks in autumn when the leaves are at their peak.

• Axial tilt
• Color change in leaves
• Effect of sun angle on climate
• Equinox
• Indian summer
• Temperate

Etymological

• Fall (Word Lore website)
• Autumn (definition on Yahoo! dictionary)
• Fall (definition on Yahoo! dictionary)
• Fall (Online Etymology Dictionary)

General

• How To Photograph Autumn Color (from the New York Institute of Photography)

Temperate seasons
Spring	Summer	Autumn/Fall	Winter
Tropical climate seasons
Wet season		Dry season