夏至是二十四节气中的第10个节气,在每年公历6月21日前后。夏至不是夏天到来的意思,进入立夏,就是夏天了,这个“至”是极致的意思。夏至这一天,日影最短,《恪遵宪度抄本》:“日影短至,故曰夏至。至者,极也。”夏至节气在易卦中属“姤”卦,五阳在上,一阴在下。俗话说,物极必反,阳盛至极,阴气渐生。和冬至一阳生,一个道理。夏至这天白昼最长,过了这天,白昼就慢慢变短了。因为这一天太阳直射到北 The summer solstice is the 10th solar term in twenty-four solar terms, around the annual Gregorian calendar June 21. The summer solstice is not the meaning of summer, into the beginning of summer, is summer, this “to ” is the ultimate meaning. The summer solstice this day, the shortest Japanese shadow, “abide by the Codex copy”: “The shadow is short, so said the summer solstice. So who is also very. ” Summer Solstice in the Yi Gua is “姤 ” Gua, five Yang on, a shade in the next. As the saying goes, things are extremely negative, extremely positive, yin and yang. And Yangsheng winter solstice, a truth. The longest day of summer solstice this day, day after day, the day becomes shorter. Because this day the sun is direct to the north