Afternoon - wikipedia Afternoon For other uses, see Afternoon ( disambiguation ). The Türkenschanzpark in Vienna during the early afternoon Visitors to the Metropolitan Museum of Art in New York City during the late afternoon Afternoon is the time of the day between noon and evening. It is the time when the sun is descending from its zenith in the sky to somewhat before its terminus at the horizon in the west direction. In human life, it occupies roughly the latter half of the standard work and school day. It is also associated with a number of concerns related to health, safety, and economic productivity : generally, the early afternoon, after most people have eaten lunch, corresponds to decreased work performance, decreased alertness, and a higher incidence of motor vehicle accidents. It is usually from 12 PM to 6 PM, but during winter it may be from 12 PM to 4 PM and during summer it may be from 12 PM to 8 PM. Contents 1 Terminology 2 Events 3 Effects on living organisms 3.1 Hormones and body temperature 3.2 Alertness 4 See also 5 Notes 6 References 7 External links Terminology Afternoon is the time occurring between noon and evening. The specific range of time this encompasses varies in one direction : noon is currently defined as a constant 12 : 00 pm, but when afternoon ends is dependent on when evening begins, for which there is no standard definition. However, before a period of transition from the twelfth to fourteenth centuries, noon instead referred to 3 pm -- possible explanations include shifting times for prayers and midday meals, along which one concept of noon was defined -- and so afternoon would have referred to a narrower timeframe. The word afternoon, which derives from after and noon, has been attested from about the year 1300 ; Middle English contained both afternoon and the synonym aftermete. The standard locative marking for the word was at afternoon in the fifteenth and sixteenth centuries but has shifted to in the afternoon since then. In Southern U.S. and Midland American English, the word evening is sometimes used to encompass all times between noon and night. The Irish language contains four different words to mark time intervals from late afternoon to nightfall, this period being considered mystical. Metaphorically, the word afternoon refers to a relatively late period in the expanse of time or in one 's life. The term should not be confused with `` after noon '' ( two separate words ), which is a translation of the Latin post meridiem ( p.m. ), meaning a time between 12 : 00 midday and 12 : 00 midnight. Events The coastline of the Atlantic Ocean in the afternoon Afternoon is a time when the sun is descending from its daytime peak. During the afternoon, the sun moves from roughly the center of the sky to deep in the west. In late afternoon, sunlight is particularly bright and glaring, because the sun is at a low angle in the sky. The standard working time in most industrialized countries goes from the morning to the late afternoon or evening -- archetypally, 9 am to 5 pm -- so the latter part of this time takes place in the afternoon. Schools usually let out during the afternoon as well. Effects on living organisms Hormones and body temperature In diurnal animals, it is typical for blood levels of the hormone cortisol -- which is used to increase blood sugar and aid metabolism and is also produced in response to stress -- to be most stable in the afternoon after decreasing throughout the morning. However, cortisol levels are also the most reactive to environmental changes unrelated to sleep and daylight during the afternoon. As a result, this time of day is considered optimal for researchers studying stress and hormone levels. Plants generally have their highest photosynthetic levels of the day at noon and in the early afternoon, owing to the sun 's high angle in the sky. The large proliferation of maize crops across Earth has caused tiny, harmless fluctuations in the normal pattern of atmospheric carbon dioxide levels, since these crops photosynthesize large amounts of carbon dioxide during these times and this process sharply drops down during the late afternoon and evening. In humans, body temperature is typically highest during the mid to late afternoon. However, human athletes being tested for physical vigor on exercise machines showed no statistically significant difference after lunch. Owners of factory farms are advised to use buildings with an east -- west ( as opposed to north -- south ) orientation to house their livestock, because an east -- west orientation generally means thicker walls on the east and west to accommodate the sun 's acute angle and intense glare during late afternoon. When these animals are too hot, they are more likely to become belligerent and unproductive. Alertness Motor vehicle accidents like this one in Poland are common during the afternoon, especially rush hour. The afternoon, especially the early afternoon, is associated with a dip in a variety of areas of human cognitive and productive functioning. Notably, motor vehicle accidents occur more frequently in the early afternoon, when drivers presumably have recently finished lunch. A study of motor accidents in Sweden between 1987 and 1991 found that the time around 5 pm had by far the most accidents : around 1,600 at 5 pm compared to around 1,000 each at 4 pm and 6 pm. This trend may have been influenced by the afternoon rush hour, but the morning rush hour showed a much smaller increase. In Finland, accidents in the agriculture industry are most common in the afternoon, specifically Monday afternoons in September. One psychology professor studying circadian rhythms found that his students performed somewhat worse on exams in the afternoon than in the morning, but even worse in the evening. Neither of these differences, however, was statistically significant. Four studies carried out in 1997 found that subjects who were given tests on differentiating traffic signs had longer reaction times when tested at 3 : 00 pm and 6 : 00 pm than at 9 : 00 am and 12 : 00 pm. These trends held across all four studies and for both complex and abstract questions. However, one UK based researcher failed to find any difference in exam performance on over 300,000 A-level exam papers sat in either the morning or afternoon. Human productivity routinely decreases in the afternoon. Power plants have shown significant reductions in productivity in the afternoon compared to the morning, the largest differences occurring on Saturdays and the smallest on Mondays. One 1950s study covering two female factory workers for six months found that their productivity was 13 percent lower in the afternoon, the least productive time being their last hour at work. It was summarized that the differences came from personal breaks and unproductive activities at the workplace. Another, larger study found that afternoon declines in productivity were greater during longer work shifts. It is important to note, however, that not all humans share identical circadian rhythms. One study across Italy and Spain had students fill out a questionnaire, then ranked them on a `` morningness -- eveningness '' scale. The results were a fairly standard bell curve. Levels of alertness over the course of the day had a significant correlation with scores on the questionnaire. All categories of participants -- evening types, morning types, and intermediate types -- had high levels of alertness from roughly 2 pm to 8 pm, but outside this window their alertness levels corresponded to their scores. See also Morning Sunset Twilight Forenoon 12 - hour clock Notes ^ Jump up to : `` Afternoon ''. Merriam - Webster. Retrieved October 9, 2014. Jump up ^ `` Noon ''. Merriam - Webster. Retrieved October 9, 2014. ^ Jump up to : `` Evening ''. Merriam - Webster. Retrieved October 9, 2014. Jump up ^ `` noon ( n. ) ''. Online Etymology Dictionary. 2001. Retrieved October 10, 2014. Jump up ^ `` afternoon ( n. ) ''. Online Etymology Dictionary. 2001. Retrieved October 10, 2014. Jump up ^ Ekirch 2006, p. xxxii ^ Jump up to : Aggarwal & Upadhyay 2013, p. 172 Jump up ^ `` Nine - to - fiver ''. Merriam - Webster. Retrieved October 9, 2014. Jump up ^ Blaskovich 2011, p. 74 Jump up ^ Sinclair & Weiss 2010, p. 118 ^ Jump up to : Refinetti 2006, p. 556 Jump up ^ McCabe 2004, p. 588 Jump up ^ Refinetti 2006, p. 559 Jump up ^ McCabe 2004, p. 471 Jump up ^ McCabe 2004, p. 590 Jump up ^ Quartel, Lara ( 2014 ). `` The effect of the circadian rhythm of body temperature on A-level exam performance ''. Undergraduate Journal of Psychology. 27 ( 1 ). Jump up ^ Ray 1960, p. 11 Jump up ^ Ray 1960, p. 12 Jump up ^ Ray 1960, p. 18 Jump up ^ Refinetti 2006, p. 561 References Aggarwal, Anjali ; Upadhyay, Ramesh ( 2013 ). Heat Stress and Animal Productivity. Springer Publishing. ISBN 978 - 8 - 132 - 20879 - 2. Blaskovich, Jim ( 2011 ). Social Psychophysiology for Social and Personality Psychology. ISBN 978 - 0 - 85702 - 405 - 3. Ekirch, A. Roger ( 2006 ). At Day 's Close : Night in Times Past. W.W. Norton & Company. ISBN 978 - 0 - 393 - 32901 - 8. McCabe, Paul T. ( 2004 ). Contemporary Ergonomics. CRC Press. ISBN 0 - 8493 - 2342 - 8. Ray, James T. ( 1960 ). Human Performance as a Function of the Work -- Rest Cycle. National Academy of Sciences. Refinetti, Roberto ( 2006 ). Circadian Physiology ( 2nd ed. ). Taylor & Francis Group. ISBN 978 - 0 - 8493 - 2233 - 4. Sinclair, Thomas M. ; Weiss, Albert ( 2010 ). Principles of Ecology in Plant Production. University of Nebraska, Lincoln / University of Florida. External links Media related to Afternoon at Wikimedia Commons The dictionary definition of afternoon at Wiktionary Parts of a day Dawn -- Twilight -- Sunrise Morning Daytime Evening Sunset -- Twilight -- Dusk Night Related articles : Belt of Venus Blue hour Golden hour Terminator Daylight Forenoon Noon Afternoon Midnight Midnight sun Polar night GND : 4485070 - 0 Retrieved from `` https://en.wikipedia.org/w/index.php?title=Afternoon&oldid=805563211 '' Categories : Parts of a day Hidden categories : Good articles Wikipedia articles with GND identifiers Talk Contents About Wikipedia বাংলা Bahasa Banjar Bân - lâm - gú Català Čeština Dansk Deutsch Emiliàn e rumagnòl Español Euskara فارسی Frysk Galego 한국어 हिन्दी Bahasa Indonesia Italiano עברית Kiswahili Kreyòl ayisyen Magyar Македонски Bahasa Melayu Mìng - dĕ̤ng - ngṳ̄ Nederlands Norsk Papiamentu Português Runa Simi Русский Scots سنڌي Svenska Tagalog தமிழ் ไทย اردو Tiếng Việt Walon Winaray 粵語 Žemaitėška 中文 Edit links This page was last edited on 16 October 2017, at 05 : 29. 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Question: what is the time between afternoon and evening
Answer: It is usually from 12 PM to 6 PM, but during winter it may be from 12 PM to 4 PM and during summer it may be from 12 PM to 8 PM.