白露（white dew）
白露是“二十四節(jié)氣“中的第15個節(jié)氣，秋季第3個節(jié)氣，干支歷申月的結束與酉月的起始.斗指癸，太陽達黃經165度，于公歷9月7-8-9日交節(jié).“白露“是反映自然界寒氣增長的重要節(jié)氣.雖然天氣逐漸轉涼，但是在白晝中午時節(jié)仍有強烈的陽光照射，溫度高天氣也是蠻熱的，但在傍晚時氣溫便很快下降，這一時期天氣的特征是晝夜溫差大.
白露節(jié)氣，溫暖潮濕的東南季風，逐漸被干燥寒冷的北方疾風所取代，暑氣漸消，秋高氣爽，丹桂飄香，鴻雁和燕子等候鳥開始南飛避寒，各種鳥類開始貯存過冬的食物.加上太陽直射點南移，北半球日照時間變短，光照強度減弱，地面輻射散熱快，所以溫度下降速度也逐漸加快.白露基本結束了暑天的悶熱，天氣漸漸轉涼，寒生露凝。古人以四時配五行，秋屬金，金色白，以白形容秋露，故名“白露.”
中國古人根據對大自然的觀察，將白露分為三候:“一候鴻雁來，二候玄鳥歸，三候群鳥養(yǎng)羞.“意思是說這個節(jié)氣，鴻雁與燕子等候鳥南飛避寒，百鳥開始貯存干果糧食以備過冬.這會兒農民也忙著收獲莊稼，正所謂“搶秋搶秋，不搶就丟“.白露期間的各地民俗，主要有祭祀大禹、釀五谷酒、喝白露茶等.
白露是干支歷酉月的起始，廿四節(jié)氣與十二月建是干支歷的基本內容.上古時代以北斗七星的運轉計算月令，斗柄所指之辰謂之“斗建“(又稱月建).如《淮南子·天文訓中》收錄:“帝張四維，運之以斗，月徙一辰，復返其所，正月指寅，十二月指丑，一歲而匝，終而復始“.這里的“斗“指的就是北斗七星的斗柄.斗柄順時針旋轉一圈為一周期，謂之一“歲“(攝提).“十二月建“是依據“二十四節(jié)氣“而來的節(jié)氣月，“十二月建“的劃分是以節(jié)令為準，即以立春、驚蟄、清明、立夏、芒種、小暑、立秋、白露、寒露、立冬、大雪、小寒，分別作為寅(攝提格)月、卯(單閼)月、辰(執(zhí)徐)月、巳(大荒落)月、午(敦牂)月、未(協洽)月、申(涒灘)月、酉(作噩)月、戌(閹茂)月、亥(大淵獻)月、子(困敦)月、丑(赤奮若)月之始.
白露是干支歷申月的結束以及酉月的起始，時間點在公歷每年9月7日到9日，太陽到達黃經165度時.
《月令七十二候集解》文字記述：白露，八月節(jié)，秋屬金，金色白，陰氣漸重，露凝而白也.鴻【淮南子作候】鴈來，鴻大鴈小，自北而來南也，不謂南鄉(xiāng)，非其居耳，詳見雨水節(jié)下，元鳥歸，元鳥，解見前，此時自南而往北也，燕乃北方之鳥，故曰歸，羣鳥養(yǎng)羞【淮南子作羣鳥翔】，三人以上為眾，獸以上為羣，羣，眾也，禮記注曰:羞者，所羹之食.養(yǎng)羞者藏之，以備冬月之養(yǎng)也.
白露節(jié)氣，天蒙蒙亮時你會發(fā)現在草叢中的葉子上地面上會有許多露珠，這是因夜晚水汽凝結在上面，故名白露.
這時節(jié)天氣轉涼.人們就會明顯地感覺到天氣涼爽，秋高氣爽的金色秋天已經到來了.晝夜溫差加大甚至可達十多度.夏至時陽氣最強大，白露節(jié)氣時則與之相反，陰氣也在此時興起.到了白露節(jié)氣，陰氣日益的加重，清晨的露水隨之逐漸加厚，凝結成一層一層的白白水滴，所以就稱之為“白露”.
俗語云：“處暑十八盆，白露勿露身.”這兩句話的意思是說，處暑仍熱，每天須用一盆水洗澡，過了十八天，到了白露，就不要赤膊裸體了，以免著涼.還有句俗話：“白露白迷迷，秋分稻秀齊..”意思是說，白露前后若有露，則晚稻將有好收成.
White Dew（Chinese language：Bailu）
Bailu is the 15th solar term in the “24 solar terms“， the third solar term in autumn， the end of the Shenyue period in the Ganzhi calendar and the beginning of the Youyue period. On Douzhigui， the sun reaches 165 degrees yellow longitude and intersects on September 7-8-9 in the Gregorian calendar It is an important solar term that reflects the growth of cold air in nature. Although the weather gradually cools down， there is still strong sunlight during the noon period of the day. High temperature weather is also quite hot， but in the evening， the temperature drops quickly. The characteristic of this period of weather is the large temperature difference between day and night
During the White Dew solar term， the warm and humid southeast monsoon was gradually replaced by the dry and cold northern gusts. The heat gradually dissipated， and the autumn was clear and the fragrance of osmanthus was fragrant. Migratory birds such as geese and swallows began to fly south to avoid the cold. Various birds began to store food for the winter. In addition， as the direct sunlight moved south， the duration of sunlight in the northern hemisphere became shorter， the intensity of light decreased， and the ground radiation and heat dissipation became faster， So the rate of temperature decrease gradually accelerated. Bai Lu basically ended the stuffy heat of the summer day， and the weather gradually turned cooler， causing cold dew to condense. The ancients used the four seasons to match the five elements， and autumn belonged to gold， with gold and white. White was used to describe autumn dew， hence the name “Bai Lu
The ancient Chinese people， based on their observation of nature， Divide Bailu into three seasons:“The first season is when the geese come， the second season is when the black birds return， and the third season is when the flocks of birds are raised in shame.“ This means that during this solar term， migratory birds such as the geese and swallows fly south to avoid the cold， and hundreds of birds begin to store dried fruits and grains for winter. At this time， farmers are also busy harvesting crops， as the saying goes，“Seize autumn， or throw away if you don't grab it.“ During the Bailu period， local customs mainly include worshiping the Great Yu， brewing grain wine， and drinking Bailu tea
Bailu is the beginning of the unitary month in the Ganzhi calendar， and the establishment of the 24 solar terms and December is the basic content of the Ganzhi calendar. In ancient times， the lunar calendar was calculated based on the operation of the Big Dipper， The star referred to by the Dou handle is called “Doujian“(also known as “Yuejian“). As recorded in the “Huainanzi Astronomical Training“，“Emperor Zhang Siwei used it to Dou， and the moon moved one hour to return to its place. The first month refers to Yin， and the twelfth month refers to Ugly， turning one year and turning one year， and then starting again.“ Here，“Dou“ refers to the handle of the Big Dipper Seven Stars. The rotation of the Dou handle clockwise once is a cycle， which is one of the “years“(photo).“Twelve month construction“ is based on the “24 solar terms“ The division of the solar terms and months that come from “Twelve Month Construction“ is based on the seasons， namely， the beginning of spring， the awakening of insects， the Qingming Festival， the beginning of summer， the awn seed， the small summer， the beginning of autumn， the white dew， the cold dew， the beginning of winter， the heavy snow， and the small cold， respectively， as the Yin (photo) month， the Mao (single) month， the Chen (Zhi Xu) month， the Si (Da Huang Luo) month， the Wu (Dun Zang) month， the Wei (Xie Qi) month， the Shen (Shen Tan) month， the You (Zuo Og) month， the Xu (eunuch) month， and the Hai (Da Yuan Xian) month. Zi (trapped) Yue， Chou At the beginning of the moon
Bailu is the end of Shenyue in the Ganzhi calendar and the beginning of Youyue in the Gregorian calendar. The time point is from September 7th to 9th every year， when the sun reaches 165 degrees yellow longitude
According to the text of the “Explanation of the Seventy Two Seasons of the Moon Order“: Bai Lu， on the eighth month of the lunar calendar， belongs to the golden and white autumn season. Yin Qi gradually increases， and the dew condenses and becomes white. When the wild geese come， the big geese are small， and they come from the north to the south. It is not called Nanxiang， nor their dwelling place. For more information， please refer to the Rainwater Festival. The Yuanniao returns， and the Yuanniao， Xie sees before. At this time， they go from the south to the north. Yan is a bird from the north， so it is called Gui. A group of birds raises shame