夏至这天，太阳运行至黄经90度（夏至点，目前处在双子座），太阳直射地面的位置到达一年的最北端，几乎直射北回归线，此时，北半球各地的白昼时间达到全年最长。对于北回归线及其以北的地区来说，夏至日也是一年中正午太阳高度最高的一天。在北京地区，夏至日白昼可长达15小时，正午太阳高度高达73°32′。这一天北半球得到的太阳辐射最多，比南半球多了将近一倍。天文专家称，夏至是太阳的转折点，这天过后它将走“回头路”，阳光直射点开始从北回归线向南移动，北半球白昼将会逐日减短。夏至日过后，北回归线及其以北的地区，正午太阳高度角也会逐日降低。同时，夏至到来后，夜空星象也逐渐变成夏季星空。
Summer solstice day, running the sun to yellow by 90 degrees (Xia Zhidian, now in Gemini). The location of direct sunlight ground reached the northernmost a year, almost directly in the northern regression line, at this time, around the northern hemisphere daylight time reached the year long. The Tropic of cancer and to the north, the summer solstice is the year the highest height of the sun at noon day. In the area of Beijing, the summer solstice day up to 15 hours, the midday sun height up to 73 degrees 32'. This day solar radiation of most of the northern hemisphere than in the southern hemisphere, nearly twice as much. Astronomy experts said, summer solstice is a turning point in the sun, the day after it will take the "back road", the point of direct sunlight began from the Tropic of cancer moved south, the northern hemisphere during the day will be daily shortening. After the summer solstice, the Tropic of cancer and to the north, the midday sun elevation angle can be decreased day by day. At the same time, after the arrival of the summer solstice, the stars also gradually become stars in the summer night.
夏至是二十四节气中最早被确定的一个节气。公元前七世纪，先人采用土圭测日影，就确定了夏至。每年的夏至从6月21日（或22日）开始，至7月7日（或8日）结束。据《恪遵宪度抄本》：“日北至，日长之至，日影短至，故曰夏至。至者，极也。”夏至这天，太阳直射地面的位置到达一年的最北端，几乎直射北回归线（北纬23°26'），北半球的白昼达到最长，且越往北昼越长。如海南的海口市这天的日长约13小时多一点，杭州市为14小时，北京约15小时，而黑龙江的漠河则可达17小时以上。同时，对于北回归线及其以北的地区来说，夏至日也是一年中正午太阳高度最高的一天。在北京地区，夏至日正午太阳高度高达73°32′。夏至过后，太阳直射地面的位置逐渐向南移动，北半球白昼开始逐日减短。对于北回归线及其以北的地区，夏至日过后，正午太阳高度也会逐日降低。民间有“吃过夏至面，一天短一线”的说法。而此时南半球正值隆冬。
The summer solstice is a solar term in twenty-four to determine the first solar term. Seventh Century BC, Chinese ancestors used to measurethe shadow, the summer solstice. The annual summer solstice from June 21st (or 22), and July 7th (or 8) end. According to "abide by the constitution of the transcript:" day "to the north, day long to fall short, this summer. To the person, is also very." The summer solstice, the location of direct sunlight ground reached the northernmost a year, almost directly in the northern regression line (latitude 23 degrees 26 '), the longest day of the northern hemisphere can be reached and the North day longer. Haikou City, such as the day of Hainan, a little more than 13 hours, Hangzhou city for 14 hours, about 15 hours, while Mohe County, Heilongjiang, Beijing, up to 17 hours or more. At the same time, the Tropic of cancer and to the north, the summer solstice is the year the highest height of the sun at noon day. In Beijing, summer solstice at noon the sun height up to 73 degrees 32'. After the summer solstice, the sun ground position gradually moved south, the northern hemisphere daylight began to reduce day by day. The Tropic of cancer and to the north, after the summer solstice, the sun at noon will be highly reduced day by day. People have to eat in summer, one day short line ". At a time when the southern hemisphere midwinter.
中国古代将夏至分为三候：“一候鹿角解；二候蝉始鸣；三候半夏生。”麋与鹿虽属同科，但古人认为，二者一属阴一属阳。鹿的角朝前生，所以属阳。夏至日阴气生而阳气始衰，所以阳性的鹿角便开始脱落。而麋因属阴，所以在冬至日角才脱落；雄性的知了在夏至后因感阴气之生便鼓翼而鸣；半夏是一种喜阴的药草，因在仲夏的沼泽地或水田中出生所以得名。由此可见，在炎热的仲夏，一些喜阴的生物开始出现，而阳性的生物却开始衰退了。中国民间把夏至后的15天分成3“时”，一般头时3天，中时5天，末时7天。这期间我国大部分地区气温较高，日照充足，作物生长很快，生理和生态需水均较多。此时的降水对农业产量影响很大，有“夏至雨点值千金”之说。一般年份，这时长江中下游地区和黄淮地区降水一般可满足作物生长的要求。《荆楚岁时记》中记有：“六月必有三时雨，田家以为甘泽，邑里相贺。”可见在1000多年前人们已对此降雨特点有明确的认识。
China ancient summer solstice is divided into three syndromes: "a syndrome of antler solution; two Hou cicada Ming start; three when raw pinellia." Elk and deer is the same, but the ancients believed that the two genus of yin and yang. The horns of a deer in the former, so is yang. Yin and Yang was born on the summer solstice decline, so the positive antlers began to fall off. And moose for belong to Yin, so in the winter solstice angle before falling; the male cicada in summer due to the sense of yin and wings and Ming; pinellia tuber is a shade loving herbs, being born in the midsummer of marshes and paddy field, so its name. Thus, in the hot summer, some shade creatures began to appear, while the positive biological began to decline. China folk to the 15 day after the summer solstice is divided into 3 "general", head in 3 days, 5 days, at the end of 7 days. During this period, most areas of China, the temperature is higher, the sunshine is sufficient, the crop growth is very fast, physiological and ecological water demand are more. The precipitation has great impact on agricultural production, "summer rain worth". In general, the precipitation in the middle and lower reaches of the Yangtze River and the Huang Huai area can generally meet the requirements of crop growth. "Age Jingchu" in mind: "in June there will be three rain, Tian Yi Li thought Ganse, aiga." Visible in more than 1000 years ago, people have a clear understanding of the characteristics of rainfall.
夏至以后地面受热强烈，空气对流旺盛，午后至傍晚常易形成雷阵雨。这种热雷雨骤来疾去，降雨范围小，人们称“夏雨隔田坎”。唐代诗人刘禹锡，曾巧妙地借喻这种天气，写出“东边日出西边雨，道是无晴却有晴”的著名诗句。对流天气带来的强降水，不都像诗中描写的那么美丽，常常带来局地灾害。[2] 诗人徐书信“在暑雨”一诗中，也对夏日雷雨天气进行了恰如其分的描述：“夏日熏风暑坐台，蛙鸣蝉噪袭尘埃。靑天霹雳金锣响，冷雨如钱扑面来。
After the summer solstice the ground is strongly heated air convection, the afternoon and evening thunderstorms often form. This heat thunderstorm has come to disease, the rainfall range is small, people called "Xia Yuge ridge". Tang Dynasty poet Liu Yuxi, who skillfully metaphor in this weather, write "sunrise east west rain, is not clear but fine" of the famous poem. Convective weather brought about by heavy rainfall, not like poetry in the description of the so beautiful, often bring local disasters. [2] the poet Xu Shuxin "in the summer rain," a poem, also on summer thunderstorm weather for the apt description: "summer summer uptrend Zuotai, meaningless argument hit the dust. Youth Day Bang gongs ring, such as blowing money to rain.”
多数情况，“夏至”期间，正值长江中下游、江淮流域梅雨，频频出现暴雨天气，容易形成洪涝灾害，甚至对人民生命财产造成威胁，应注意加强防汛工作。
Most of the time, during the summer solstice, coincided with the Yangtze River in the middle and lower reaches, Jianghuai Meiyu appeared again and again heavy rain, easy to form flood disaster, and even pose a threat to the lives and property of the people, we should pay more attention to strengthen the flood prevention work.
夏至时节正是江淮一带的“梅雨”季节，这时正是江南梅子黄熟期，空气非常潮湿，冷、暖空气团在这里交汇，并形成一道低压槽，导致阴雨连绵的天气。在这样的天气下，器物发霉，人体也觉得不舒服，一些蚊虫繁殖速度很快，一些肠道性的病菌也很容易滋生。这时要注意饮用水的卫生，尽量不吃生冷食物，防止传染病发生和传播。
Along the Huaihe Meiyu season is the summer season, when it is south of the plum ripening stage, the air is very humid, cold and warm air mass in this intersection, and the formation of a trough of low pressure, resulting in the rainy weather. In this weather, artifacts, the human body is not comfortable, some mosquito breeding speed is very fast, some intestinal bacteria are also very easy to breed. Then pay attention to the sanitation of drinking water, try not to eat cold food, to prevent the occurrence and spread of infectious diseases.
夏至和冬至一样，都是反映四季更替的节气。天文学上规定，夏至为北半球夏季的开始。夏至过后，虽然太阳直射点开始由北回归线逐渐向南移动，北半球白昼逐日变短，黑夜逐日变长，对于北回归线及其以北的地区，正午太阳高度也逐日降低，但由于太阳辐射到地面的热量仍比地面向空中散发的多，故在以后的一段时间内，气温将继续升高，因此有“夏至不过不热”的说法。从1951年～2006年的资料来看，北方许多城市的历史极值都出现在夏至后。
The summer solstice and winter solstice, the seasons are a reflection of the solar term. Astronomy, the beginning of summer for the northern hemisphere summer solstice. After the summer solstice, although sun point start from North regression line gradually moved south, the northern hemisphere day daily shorter, variable length day by day and night, the Tropic of cancer and the area to the north, reduce the height of the sun at noon also day by day, but due to solar radiation to the ground heat than for the air circulated, so in the later period of time. The temperature will continue to rise. So it is "summer solstice but not hot" argument. From 1951 to 2006 data, the history of extreme north of the city many appear in after the summer solstice.
公式：
Formula: D+C]-L and [Y
公式解读：Y=年数后2位，D=0.2422，L=闰年数，21世纪C=21.37，20世纪=22.20。
Interpretation: Y= years of formula 2, D=0.2422, L= leap years twenty-first Century C=21.37, twentieth Century =22.20.
举例说明：2088年夏至日期=[88×0.2422+21.37]-[88/4]=42-22=20，6月20日夏至。
For example: the 2088 solstice date of =[88 * 0.2422+21.37]-[88/4]=42-22=20, June 20th summer solstice.
例外：1928年的计算结果加1日。
Exception: 1928 calculation results plus 1 days.
“冬至饺子夏至面”，好吃的北京人在夏至这天讲究吃面。按照老北京的风俗习惯，每年一到夏至节气就可以大啖生菜、凉面了，因为这个时候气候炎热，吃些生冷之物可以降火开胃，又不至于因寒凉而损害健康。夏至这天，北京各家面馆人气很旺。无论面馆的四川凉面、担担面、红烧肉面还是炸酱面等等，各种面条都很“畅销”。
"The winter solstice summer solstice dumplings", the good people of Beijing in the summer solstice eat noodles. According to the customs of old Beijing, a year to the summer solstice solar terms can pampered with lettuce, noodles, because this time the climate is hot, eat some cold things can reduce pathogenic fire appetizer, unapt harm to health by the cold. The summer solstice, the popular Beijing noodle shop. No matter the noodle, noodle, Cold Noodles, Sichuan Style Braised pork in brown sauce or Noodles with Soy Bean Paste and so on, all kinds of noodles are very popular".
旧时，在浙江绍兴地区，人们不分贫富，夏至日皆祭其祖，俗称“做夏至”，除常规供品外，特加一盘蒲丝饼。而绍兴地区龙舟竞渡因气候故，明、清以来多不在端午节，而在夏至，此风俗至今尚存。
Old, in Shaoxing area, people does not divide between rich and poor, the summer solstice all offering its progenitor, known as the "summer solstice", in addition to the regular offerings, vodka a plate of Pu Si cake. Shaoxing dragon boat race because of climate so, since the Ming and Qing Dynasties is not at the Dragon Boat Festival, and in the summer solstice, the custom still exists.
夏至这天，无锡人早晨吃麦粥，中午吃馄饨，取混沌和合之意。有谚语说：“夏至馄饨冬至团，四季安康人团圆。”吃过馄饨，为孩童称体重，希望孩童体重增加更健康。
The summer solstice, Wuxi people eat porridge morning, noon to eat wonton, take and the meaning of chaos. The proverb says: "the summer solstice winter solstice wonton group, four Ankang reunion." Eat wonton, for children weighing, hope children more healthy weight gain.
夏至这天山东各地普遍要吃凉面条，俗称过水面，有“冬至饺子夏至面”的谚语。莱阳一带夏至日荐新麦，黄县（今龙口市）一带则煮新麦粒吃，儿童们用麦秸编一个精致的小笊篱，在汤水中一次一次地向嘴里捞，既吃了麦粒，又是一种游戏，很有农家生活的情趣。平阴一带，夏至日祭祀祖先。
The summer solstice everywhere in Shandong to eat cold noodles, commonly known as water, "the winter solstice summer solstice dumpling face" proverbs. Laiyang area summer solstice recommended new wheat, Huangxian (now Longkou City) in the vicinity of the cooked grain to eat, children with wheat straw compiled a delicate little skimmer, in the soup again and again to the mouth fishing, not only to eat the grain, and is a game, a taste of life on the farm. The area of Pingyin, the summer solstice ancestor worship.
夏季阳气盛于外。从夏至开始，阳极阴生，阴气居于内，所以，在夏至后，饮食要以清泄暑热、增进食欲为目的，因此要多吃苦味食物，宜清补。《吕氏春秋·尽数篇》指出：“凡食无强厚味，无以烈味重酒。”唐朝的孙思邈提倡人们“常宜轻清甜淡之物，大小麦曲，粳米为佳”，又说：“善养生者常须少食肉，多食饭”。在强调饮食清补的同时，勿过咸、过甜，宜多吃具有祛暑益气、生津止渴的食物。
Yang Sheng in summer. From the beginning of the summer solstice, anode shade, Yin living inside, so after the summer solstice, diet to relieving summer heat, increase appetite for the purpose, so to eat bitter foods, Yiqing fill. "LvShiChunQiu", has pointed out: "where no strong food with strong taste delicious, no wine." Of the Tang Dynasty, Sun Simiao advocated people "should be light light sweet things, size of malt, rice is better", said: "good health who often have to be less meat, eat." At the same time on diet to make clear, not too salty or sweet, should eat with Qi, thirst Qushu food.
绿叶菜和瓜果类等水分多的蔬菜水果都是不错的选择，如白菜、苦瓜、丝瓜、黄瓜等，都是很好的健胃食物。而面条，也是夏至后被推荐的美食之一。在中国北方流行一句谚语：“冬至饺子夏至面”，尤其是凉面，既能降火开胃，又不至于因寒凉而损害健康。
Green leafy vegetables and fruits such as water content of fruits and vegetables is a good choice, such as cabbage, bitter gourd, sponge gourd, cucumber are a good stomach food. One of the noodles, delicacy is recommended after the summer solstice. In popular in northern China a proverb: "the winter solstice summer solstice dumpling face", especially cold noodles, which can not only reduce pathogenic fire appetizer, unapt harm to health by the cold.
在这里，还要向大家隆重推荐一种食材——生姜。有俗话说：“饭不香，吃生姜”、“冬吃萝卜，夏吃姜”、“早上三片姜，赛过喝参汤”，都是对生姜所具有的营养价值和医疗作用所做的精辟的概括。夏季暑热，多数人食欲不振，而生姜有利于食物的消化和吸收，对于防暑度夏有一定益处。另有“男子不可百日无姜”的说法。夏季万物生长，阳极阴生，心旺肾衰，因此，适量进补对男子性功能的保护和提升还是很有好处的。
Here, we would like to recommend a grand ingredient - ginger. As the saying goes: "rice is not fragrant, eat ginger", "winter eating radishes, summer eating ginger", "in the morning three slices of ginger is better than the drink ginseng soup, is a generalization of penetrating the ginger with nutritional value and medical function. Summer, most people, loss of appetite and ginger conducive to digestion and absorption of food, for sunstroke in summer have certain benefits. Otherwise, the man can not be a hundred days without ginger. Summer things grow, anode shade, Wang heart failure. Therefore, the amount of tonic on male sexual function to protect and enhance is still very good.
夏至后，气温逐渐升高，人体出汗量也会随之增加，因此人体需水量大。对此，还可以在饮食上加以调节，如喝些绿豆汤、淡盐水等。需注意的是，绿豆汤不要多喝，更不能当水喝。属于寒凉体质和体质虚弱之人也不适宜饮用绿豆汤。
After the summer solstice, the temperature gradually increased, human sweat will also increase, so the body needs water. In this regard, can also be adjusted in the diet, such as drinking some green bean soup, dilute brine, etc.. It should be noted that the mung bean soup do not drink, but not when the water to drink. Belongs to the cold body and weak person is also not suitable for drinking green bean soup.
以上讲的是从饮食上注意养生保健，而在精神上也要注意调养。《周易》理论认为：夏属火，对应五脏之心。因此，夏至后重在养心。夏日炎炎，往往让人心烦意乱，而烦则更热，可影响人体的功能活动，从而产生许多精神方面的不良影响。俗话说：“心静自然凉”，因此，要善于调节，多静坐，排除心中杂念。
The above is from the diet to health care, and in the spirit of to care. "Zhou Yi" theory: summer is fire, the corresponding internal organs of the heart. Therefore, after the summer solstice is yangxin. The hot summer, often make people upset, and vexed is more heat, can affect the function of the human body, and thus produce a lot of adverse effects on the spirit. As the saying goes: "cool", therefore, should be good at regulating, multi sit, get rid of his thoughts.
祭神祀祖：夏至时值麦收，自古以来有在此时庆祝丰收、祭祀祖先之俗，以祈求消灾年丰。因此，夏至作为节日，纳入了古代祭神礼典。《周礼·春官》载：“以夏日至，致地方物魈。”周代夏至祭神，意为清除荒年、饥饿和死亡。夏至日正是麦收之后，农人既感谢天赐丰收，又祈求获得“秋报”。夏至前后，有的地方举办隆重的“过夏麦”，系古代“夏祭”活动的遗存。 消夏避伏：夏至日，妇女们即互相赠送折扇、脂粉等什物。《酉阳杂俎·礼异》：“夏至日，进扇及粉脂囊，皆有辞。”“扇”，借以生风；“粉脂”，以之涂抹，散体热所生浊气，防生痱子。在朝廷，“夏至”之后，皇家则拿出“冬藏夏用”的冰“消夏避伏”，而且从周代始，历朝沿用，进而成为制度。
Sacrifice to ancestors: the duration of the summer solstice wheat, since ancient times have at this time to celebrate the harvest, the custom of ancestor worship, to pray misfortunes Nianfeng. Therefore, as the summer solstice festival in ancient ritual ceremony. "Zhou Chun Guan" contains: "in the summer to, to the local object." Zhou Dai summer solstice ritual, meaning clear, starving and dying of famine. The summer solstice is after the wheat harvest, farmers not only for a good harvest, prayed for "autumn". Before and after the summer solstice, in some places held a grand "summer wheat", "Summer Festival" activities of the Department of ancient relics. V: avoid summer summer solstice, that women give each other fans, cosmetics and other physical. "Rites" of Youyangzazu: "summer solstice, into the fan and the powder fat sac, has resigned." "Fan", to the wind; "powder fat", to apply the heat dispersion, foul air, anti heat rash. In the court, "after the summer solstice, the Royal Show" Dongcang summer with "ice" summertime avoid volts, and from the beginning of the Zhou Dynasty, adopted in the past dynasties and become a system.
“麦粽”与“夏至饼”：江南食俗，一般有麦粽、角黍、李子、馄饨、汤面等。《吴江县志》：“夏至日，作麦粽，祭先毕，则以相饷。”不仅食“麦粽”，而且将“麦粽”作为礼物，互相馈赠。夏至日，农家还擀面为薄饼，烤熟，夹以青菜、豆荚、豆腐、及腊肉等，祭祖后食用，俗谓“夏至饼”，或分赠亲友。 冬至馄饨夏至面：自古以来，中国民间就有“冬至馄饨夏至面”的说法，江南一带夏至吃面是很多地区的重要习俗，民间有“吃过夏至面，一天短一线”的说法。南方的面条品种多，如阳春面、干汤面、肉丝面、三鲜面、过桥面及麻油凉拌面等，而北方则是打卤面和炸酱面。“因夏至新麦已经登场，所以夏至吃面也有尝新的意思。”
"Wheat dumplings" and "summer solstice cake": Jiangnan Food, dumplings, dumplings, generally have wheat plums, wonton, noodles etc.. "Wujiang county": "the summer solstice, make wheat dumplings, offering first completed, in the phase of rates." Not only eat wheat dumplings ", and the" wheat dumplings "as a gift, a gift to each other. The summer solstice, farmers also roll out the dough for pizza, baked, clip vegetables, beans, tofu, and bacon and other, ancestor worship food, custom predicate "summer solstice cake" or gifts to friends and relatives. Summer solstice winter solstice wonton noodles: since ancient times, China folk have "summer solstice winter solstice wonton noodles" argument, the area south of the Yangtze River summer solstice eat noodles is an important in many parts of the customs, folk has "the summer to eat, a day short line" argument. South noodles varieties, such as Yang Chunmian, dry noodles in soup, noodles with shredded meat, seafood, crossing the bridge noodles and sesame oil cold noodles, etc., while the north is noodles, and noodles. "Because of the new wheat summer solstice has been the stage, so the summer solstice eat noodles have new meaning."
最能反映我国大部分地区气候特点的是最近在湖北省老河市一座禹王庙正厅的榆木大梁上的《夏至九九歌》，全文是：夏至入头九，羽扇握在手；二九一十八，脱冠着罗纱；三九二十七，出门汗欲滴；四九三十六，卷席露天宿；五九四十五，炎秋似老虎；六九五十四，乘凉进庙祠；七九六十三，床头摸被单；八九七十二，子夜寻棉被；九九八十一，开柜拿棉衣。
Most can reflect our country most of the regional climate characteristics is recently in elm beams in Lao river city, Hubei Province, a Yuwang Temple main hall of the summer solstice the multiplication table ", the article is: Summer Solstice into the first nine, lupine grip in the hand; Erjiuyishiba and take off the crown with gauze; 27, sweat dripping out; Sijiusanshiliu, Vol. open-air seats for the night; 59415 inflammatory autumn tiger; Liujiuwushisi, shade into the temple; Qijiuliushisan, bedside touch sheet; Bajiuqishier, midnight find quilts; 9981, open the cabinet cotton padded clothes to take.