Why is there a leap June this year?
In recent years, the appearance of leap months in the lunar calendar has often aroused public curiosity and discussion. There happens to be a leap month in 2023, which makes many people wonder: Why is there a leap month? How is leap June determined? This article will combine the hot topics and hot content on the Internet in the past 10 days and give you detailed answers through structured data.
1. The origin of leap month
The lunar calendar is a lunisolar calendar that takes into account both the moon phase changes (lunar calendar) and the solar return year (solar calendar). Since the lunar year is about 11 days shorter than the tropical year, in order to reconcile the differences between the two, the ancients set up a leap month. The specific rules are as follows:
| Project | Description |
|---|---|
| Number of days in lunar year | About 354 days (12 months) |
| Number of days in the tropical year | About 365.24 days |
| Leap month cycle | 7 leaps in 19 years (about once every 2-3 years) |
2. Astronomical basis for leap June in 2023
Leap June in 2023 is determined by the following astronomical data:
| Time node | astronomical events |
|---|---|
| July 23, 2023 | The first new moon after the summer solstice (the first day of the sixth lunar month) |
| August 22, 2023 | The next new moon (the first day of leap June) |
| September 20, 2023 | The new moon after the Bailu solar term (the first day of the seventh lunar month) |
According to"No Zhongqi sets leap"According to the principle (the lunar month does not contain solar terms, a leap month will be set), there are two new moons between the summer solstice and Bailu in 2023, but only one solar term (Great Heat) is included, so a leap month needs to be set in June.
3. Correlation analysis of hot topics on the entire network
By combing through recent hot search topics, we found that public discussions on leap months mainly focus on the following aspects:
| Topic Category | Hot search examples | Discussion popularity |
|---|---|---|
| traditional culture | #闰月要buy shoes for my parents# | Weibo read 230 million |
| Calendar science | #WhytherearetwoJunesthisyear# | Douyin views 58 million |
| special customs | #The particularities of leap month rice# | Xiaohongshu Notes 120,000+ |
4. The impact and interesting facts of leap six months
1.Calendar influence: The lunar calendar year in 2023 is 384 days long, 19 days longer than the Gregorian calendar year, causing the Spring Festival to be postponed to February 10, 2024.
2.folk activities: In some areas, there is a custom of "giving parents leap month shoes" during the leap month, which means health and longevity. Sales of related products increased by 45% year-on-year (Taobao data).
3.birthday fun: People born in the sixth month of the lunar calendar can celebrate two birthdays, but tradition holds that "birthdays in leap months should be celebrated in advance." Related topics triggered millions of interactions on Bilibili.
5. Frequently Asked Questions
| question | answer |
|---|---|
| Is leap June common? | Appeared 7 times in the 21st century (2006, 2009, 2012, 2014, 2017, 2020, 2023) |
| When is the next leap month? | Leap May 2025 |
| Do I need to adjust solar terms during leap months? | No, solar terms always correspond to fixed dates in the Gregorian calendar |
From the above analysis, it can be seen that the emergence of leap six months is a perfect embodiment of the combination of ancient wisdom and modern astronomy. This special calendar arrangement not only maintains the inheritance of traditional culture, but also adds a unique cultural footnote to contemporary life.
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