丙午马年到来，很多人发现马年出现了"两头无立春"现象，也就是全年没有立春日，民间称这样的年份为"无春年"，于是网上出现了"马年无春，不宜 嫁娶"的说法。马年无春的说法准确吗？无春真的不能结婚吗？事实究竟如何？天文专家揭秘。 丙午马年有"立春"节气 专家表示，网络传言中，把"无春年"渲染成百年一遇的"异常年份"，这其实是一种认知偏差，这样的年份其实并不鲜见。接下来为大家普及另一个概 念，"双春"，或者叫"两头春"。 查看网络传言所谓的"无春"，大概指2026年立春日期为2月4日，此时农历还是乙巳蛇年的腊月十七，下一个立春节气是2027年的2月4日，所以2026年马 年就没有立春节气。按民间的说法，没有立春节气的年份为"无春年"，民间也称其为寡年、哑年、黑年。于是，网络上就附会出"马年无春，不宜嫁娶""寡 年无春，不宜结婚"等传言。北京天文馆的古天文科普专家介绍，这一传言其实经不起推敲，"丙午马年"是有"立春"节气的。 北京天文馆副研究员 杨帆：2026年的立春日是乙巳蛇年的腊月十七，而下一年2027年的立春日为丙午马年腊月二十八。所以"丙午马年"是有"立春"节 气的，只不过是"年尾春"。 显然，谣言的炮制者为了 ...

Group 1 - The core reason for the difference in the lengths of the Gregorian and lunar years is due to their reliance on different celestial cycles [3] - The Gregorian calendar is a solar calendar based on the Earth's orbit around the Sun, with an average year length of approximately 365.2422 days [3] - The lunar calendar, or Chinese calendar, is a lunisolar calendar that considers both the lunar phases and the solar year, resulting in an average year length of about 354 days [5] Group 2 - The Gregorian year 2026 is a common year with 365 days, while the lunar year of the Year of the Horse (丙午) is also a common year with 354 days, making the Gregorian year 11 days longer [7] - To reconcile the differences between the lunar and solar years, the lunar calendar includes leap months, with approximately 7 leap years occurring every 19 years, extending those years to about 384 days [5]

Core Viewpoint - The difference in the length of the Gregorian calendar year and the lunar calendar year is due to their reliance on different celestial cycles for their respective calendar systems [3][5][7]. Group 1: Gregorian Calendar - The Gregorian calendar is based on the solar cycle, with a year length of approximately 365.2422 days, leading to the establishment of regular years (365 days) and leap years (366 days) [3][6]. - The rules for leap years in the Gregorian calendar are "one leap year every four years, no leap year in a century, and a leap year every four centuries" [3]. Group 2: Lunar Calendar - The lunar calendar, or traditional Chinese calendar, is a lunisolar calendar that considers both the lunar phases and the solar year, with an average year length of about 354 days [5][6]. - To reconcile the difference between the lunar year and the solar year, the lunar calendar includes intercalary months, with approximately seven leap years occurring every 19 years, resulting in a leap year length of about 384 days [5].

Core Viewpoint - The Mid-Autumn Festival in 2023 falls on October 6, making it one of the latest dates for the festival in this century, occurring 19 days later than last year's date [1][3]. Group 1: Calendar and Lunar Cycle - The varying Gregorian dates for the Mid-Autumn Festival are due to the differences between the Gregorian and lunar calendars [3][4]. - The lunar calendar is a lunisolar calendar that accounts for the moon's phases and the solar year, with an average lunar month lasting about 29.5 days and a lunar year typically being 354 or 355 days, which is about 11 days shorter than the Gregorian year [3][4]. - To reconcile the differences between the two calendars, a leap month is added in the lunar calendar, resulting in a leap year lasting 383 or 384 days, which is about 19 days longer than the Gregorian year [3][4]. Group 2: Historical Context - In the 21st century, the latest Mid-Autumn Festival dates have occurred on October 6 in the years 2006, 2025, 2063, and 2082 [7][9]. - The dates for the Mid-Autumn Festival in this century range from September 7 to October 6, with the earliest occurrence on September 7 in 2052 [9]. Group 3: Moon Phases - This year's Mid-Autumn Festival features the phenomenon of "the full moon on the 15th being round on the 16th," with the moon reaching its fullest point on October 7 at 11:48 AM [10][12]. - Between 2001 and 2100, there will be 48 instances of the moon being "round on the 16th," 38 instances on the "15th," and 14 instances on the "17th," with no occurrences on the "14th" [10][12].