今年清明巧逢农历闰二月，咋回事？
<section style="margin-bottom: 0px;"><span style="color: rgb(34, 34, 34);font-family: -apple-system, system-ui, Helvetica Neue, PingFang SC, Hiragino Sans GB, Microsoft YaHei UI, Microsoft YaHei, Arial, sans-serif;letter-spacing: 0.544px;background-color: rgb(255, 255, 255);"></span></section><p></p><section style="box-sizing: border-box;font-size: 16px;"><section style="margin-top: 10px;margin-bottom: 10px;box-sizing: border-box;" powered-by="xiumi.us"><section style="border-color: rgb(71, 193, 168);box-shadow: rgb(71, 193, 168) 0px 0px 10px inset;padding: 10px;border-width: 1px;border-style: solid;background-image: linear-gradient(to top, rgb(230, 246, 221) 0%, rgba(230, 246, 221, 0) 95%);box-sizing: border-box;"><section style="font-size: 17px;box-sizing: border-box;" powered-by="xiumi.us"><p style="white-space: normal;box-sizing: border-box;">4月5日将迎来兼具“节气”和“节日”两种身份的清明。一些公众发现，今年的清明有些不一般，是闰月清明，即清明落在了农历闰二月。这是咋回事？听听天文科普专家怎么说。</p></section></section></section></section><p></p><p style="text-align: center;"></p><p style="line-height: 1.6em;text-align: justify;margin: 0px 0px 24px;text-indent: 0em;"><span style="color: rgb(51, 51, 51);font-size: 17px;letter-spacing: normal;text-decoration: none;">很多人认为，一个月过完，再“免费”续上一个月，这叫闰月，其实这并不准确。中国天文学会会员、天津市天文学会理事杨婧解释说，我国农历为调节回归年与朔望月周期不相等而增加的月份称为“闰月”。农历闰月的设置采取的是“19年7闰”的方法，即19年里添加7个闰月，有闰月的农历年份也叫闰年。</span></p><p style="line-height: 1.6em;text-align: justify;margin: 0px 0px 24px;text-indent: 0em;"><span style="color: rgb(51, 51, 51);font-size: 17px;letter-spacing: normal;text-decoration: none;"> 我国古人依据太阳的运行规律，将一年分为24个节气，包括12个“节气”和12个“中气”，在公历上的日期相对固定，而农历是以月亮的一个盈亏周期来定月，所以，节气和中气在农历中并不固定。农历历法规定，每个农历月都有一个中气，如果某个月中不包含中气，就算上一个月的闰月，为置闰，正如民谚所说“人没中气就会虚，月没中气就得闰”。</span></p><p style="text-align: center;"></p><p style="line-height: 1.6em;text-align: justify;margin: 0px 0px 24px;text-indent: 0em;"><span style="color: rgb(51, 51, 51);font-size: 17px;letter-spacing: normal;text-decoration: none;">农历癸卯兔年的闰二月就是今年二月的闰月。这个闰二月从公历3月22日开始到4月19日结束，中间只有一个节气清明。</span></p><p style="line-height: 1.6em;text-align: justify;margin: 0px 0px 24px;text-indent: 0em;"><span style="color: rgb(51, 51, 51);font-size: 17px;letter-spacing: normal;text-decoration: none;"> 闰二月比较少见，就21世纪这100年而言，仅有四次，分别为2004年、2023年、2042年和2099年，而这四个年份的清明也都落在了闰二月。</span></p><p style="line-height: 1.6em;text-align: justify;margin: 0px 0px 24px;text-indent: 0em;"><span style="color: rgb(51, 51, 51);font-size: 17px;letter-spacing: normal;text-decoration: none;"> “清明在公历年中的日期是基本固定的，绝大多数年份为4月5日，个别年份为4月4日或4月6日，而闰二月的时间一般在公历3月下旬至4月中旬，所以有闰二月的年份，清明必定落在闰二月里。2004年和2023年的清明落在闰二月十五，2042年和2099年的清明落在闰二月十四。”杨婧说。</span></p><p style="text-align: center;"></p><p></p><section style="line-height: 1.6em;text-align: justify;margin: 0px;text-indent: 0em;"><span style="color: rgb(51, 51, 51);font-size: 17px;letter-spacing: normal;text-decoration: none;"></span></section><section style="line-height: 1.6em;text-align: justify;margin: 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