一些细心的公众发现，7月25日，并没有迎来农历七月初一，而是闰六月初一。这是怎么回事呢？ 中国天文学会会员、天津市天文学会理事杨婧解释说，农历是我国传统历法，它是兼顾月球绕地球运行周期和地球绕太阳运行周期而制定的一种 历法，是一种阴阳合历。 | 27 | 20 | 13 | 6 | | SUN | 七月- | | --- | --- | --- | --- | --- | --- | --- | | 28 初四 | 21 | 14 二十 | 7 小暑 | | MON | | | 29 初五 | 22 | 15 | 中国 | 1 建党节 | TUE | | | 30 初六 | 23 甘九 | 16 | 마 | 初八 | WED | | | 31 初七 | 24 | 12 | 10 十六 | 初九 | TI IU | | | | 25 闽六月 | 18 #四 | ++ | র্ব 初十 | FRI | | | | 26 | 19 甘豆 | 12 十八 | + | SAT | -JULY | | | | | 24 初二 31 初九 | 17 甘四 | 10 | ਤ 初十 | | SUN | 八月- | | --- ...

Core Viewpoint - The article discusses the occurrence of a leap month in the lunar calendar, specifically the leap June in 2023, and explains the astronomical reasoning behind it [2][6]. Summary by Sections Lunar Calendar Explanation - The lunar calendar is based on the moon's orbit around the Earth and the Earth's orbit around the sun, making it a lunisolar calendar [2][6]. - A lunar month is approximately 29.53 days, leading to a lunar year of about 354 or 355 days, which is about 11 days shorter than a solar year of 365.24 days [6]. Leap Month Mechanism - To align the lunar calendar with the solar calendar, ancient astronomers introduced leap months, adding 7 leap months in a 19-year cycle [6]. - The placement of leap months is determined by the 24 solar terms, which divide the Earth's orbit into 24 segments [6]. Current Leap Month Details - In 2023, the leap month is designated as "leap June," occurring from July 25 to August 22, with only one solar term (Liqiu) present in this period [6]. - The leap month has 29 days, and the absence of a solar term in the preceding month led to its designation as a leap month [6]. Frequency of Leap Months - This century will see a total of six occurrences of leap June, specifically in the years 2017, 2025, 2036, 2055, 2074, and 2093 [7]. Climate Connection - The article clarifies that the recent extreme heat is not related to the leap month phenomenon, emphasizing that leap months are normal occurrences in the lunar calendar [8].