今天进入，下次要等11年
<div class="wx_rich_media_content" id="jsWxContainer"><section class="mp_profile_iframe_wrp" nodeleaf="" data-action-id="mdh1tzv21zsf" data-mpa-action-id="mdh1tzt52sp" style='line-height: 1.75em;'><mp-common-profile class="custom_select_card mp_profile_iframe" data-pluginname="mp-common-profile" data-nickname="长江云新闻" data-alias="changjiangyunnews" data-from="0" data-headimg="http://mmbiz.qpic.cn/mmbiz_png/f91uJOcbkQawkB2UGiaNdNHV4cia1H1gJmxZo2XRiaueytNPglUAaHtvdT0ia3ibKvGiamXmHonxM4wLHD0GDhhx6Dibg/0?wx_fmt=png" data-signature="云开见世界" data-id="MzI1MTAyOTA4Ng==" data-service_type="1"></mp-common-profile></section><section data-role="outer" data-pm-slice="0 0 []"><section data-role="paragraph" data-mpa-action-id="mdg1bcqz18fm" data-pm-slice="0 0 []"><section data-role="outer" data-pm-slice="0 0 []"><section data-role="paragraph" data-mpa-action-id="mdg1bcqz18fm" data-pm-slice="0 0 []"><section style='line-height: 1.75em;' data-pm-slice="2 2 },namespaceURI:http://www.w3.org/1999/xhtml},para,{tagName:section,attributes:{data-role:paragraph,data-mpa-action-id:mdg1bcqz18fm,data-pm-slice:0 0 []},namespaceURI:http://www.w3.org/1999/xhtml}]"><span leaf="" style='color: rgba(0, 0, 0, 0.9); font-size: 17px; font-family: mp-quote, "PingFang SC", system-ui, -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 0.034em;'><br></span></section><p style='text-align: justify; color: rgb(0, 0, 0); letter-spacing: 1px; font-size: 17px; line-height: 1.75;' mpa-paragraph-type="body" data-pm-slice="0 0 []"><span leaf="">一些细心的公众发现，</span><strong style='text-align: left; letter-spacing: 0px; line-height: 1.6;'><span leaf=""><span textstyle='' style='color: rgb(2, 30, 170);'>7月24日是农历六月的最后一天，转天，也就是7月25日，并没有迎来农历七月初一，而是闰六月初一</span></span></strong><span leaf=""><span textstyle='' style='color: rgb(2, 30, 170);'>。</span>这是怎么回事呢？</span></p><p style='text-align: justify; color: rgb(0, 0, 0); letter-spacing: 1px; font-size: 17px; line-height: 1.75;' mpa-paragraph-type="body"><span leaf=""><br></span></p><p style='text-align: justify; color: rgb(0, 0, 0); letter-spacing: 1px; font-size: 17px; line-height: 1.75;' mpa-paragraph-type="body"><span leaf="">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。</span></p><p style='text-align: justify; color: rgb(0, 0, 0); letter-spacing: 1px; font-size: 17px; line-height: 1.75;' mpa-paragraph-type="body"><span leaf=""><br></span></p><section style='text-align: justify; color: rgb(0, 0, 0); letter-spacing: 1px; font-size: 17px; line-height: 1.75;' mpa-paragraph-type="image" nodeleaf=""><span class="wxart_image" wx-style='display:inline-block;height: auto !important;visibility: visible !important;width: 660px !important;'></span></section><p style='text-align: justify; color: rgb(0, 0, 0); letter-spacing: 1px; font-size: 17px; line-height: 1.75;' mpa-paragraph-type="body"><span leaf=""><br></span></p><p style='text-align: justify; color: rgb(0, 0, 0); letter-spacing: 1px; font-size: 17px; line-height: 1.75;' mpa-paragraph-type="body"><span leaf="">农历月以月球绕地球运行周期即朔望月为准，朔望月平均长度是29.53天，累积12个朔望月，也就是一个农历年的长度，为354天或355天，与一个回归年（365.24天）相差11天左右。“经年累月”下去就会发生农历年的月份与季节不能对应、寒暑颠倒的现象。</span></p><p style='text-align: justify; color: rgb(0, 0, 0); letter-spacing: 1px; font-size: 17px; line-height: 1.75;' mpa-paragraph-type="body"><span leaf=""><br></span></p><p style='text-align: justify; color: rgb(0, 0, 0); letter-spacing: 1px; font-size: 17px; line-height: 1.75;' mpa-paragraph-type="body"><span leaf="">我国古代天文学家考虑到这一点，在编制历法时，为使每月中都含有月相的意义，就以朔望月为主，同时兼顾一年的寒暑季节变化，采用置闰月的方法解决了这个问题，</span><strong style='text-align: left; letter-spacing: 0px; line-height: 1.6;'><span leaf=""><span textstyle='' style='color: rgb(2, 30, 170);'>也就是在19年中安排7个闰月</span></span></strong><span leaf="">，这样一来，农历年的平均长度和回归年的平均长度就基本相符了。</span></p><p style='text-align: justify; color: rgb(0, 0, 0); letter-spacing: 1px; font-size: 17px; line-height: 1.75;' mpa-paragraph-type="body"><span leaf=""><br></span></p><p style='text-align: justify; color: rgb(0, 0, 0); letter-spacing: 1px; font-size: 17px; line-height: 1.75;' mpa-paragraph-type="body"><span leaf="">杨婧介绍，置闰的规则不是随机的，而是根据二十四节气来确定。二十四节气是将地球绕太阳运行的轨道即黄道，以15度为间隔等分为24份，又分为12个节气和12个中气，二者相间排列。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，就算作上一个月的闰月，称为置闰。</span></p><p style='text-align: justify; color: rgb(0, 0, 0); letter-spacing: 1px; font-size: 17px; line-height: 1.75;' mpa-paragraph-type="body"><span leaf=""><br></span></p><p style='text-align: justify; color: rgb(0, 0, 0); letter-spacing: 1px; font-size: 17px; line-height: 1.75;' mpa-paragraph-type="body"><span leaf="">今年7月22日（农历六月二十八），是中气大暑，下一个中气处暑在8月23日（农历七月初一），这当中的7月25日至8月22日的农历月中只有一个节气立秋，没有中气，所以这个农历月就定为闰月。因为上一个月是六月，所以这个闰月就称为“闰六月”，共29天。</span></p><p style='text-align: justify; color: rgb(0, 0, 0); letter-spacing: 1px; font-size: 17px; line-height: 1.75;' mpa-paragraph-type="body"><span leaf=""><br></span></p><section style='text-align: justify; color: rgb(0, 0, 0); letter-spacing: 1px; font-size: 17px; line-height: 1.75;' mpa-paragraph-type="image" nodeleaf=""><span class="wxart_image" wx-style='display:inline-block;height: auto !important;visibility: visible !important;width: 660px !important;'></span></section><p style='text-align: justify; color: rgb(0, 0, 0); letter-spacing: 1px; font-size: 17px; line-height: 1.75;' mpa-paragraph-type="body"><span leaf=""><br></span></p><p style='text-align: justify; color: rgb(0, 0, 0); letter-spacing: 1px; font-size: 17px; line-height: 1.75;' mpa-paragraph-type="body"><span leaf="">杨婧表示，</span><strong style='text-align: left; letter-spacing: 0px; line-height: 1.6;'><span leaf=""><span textstyle='' style='color: rgb(2, 30, 170);'>闰六月并不罕见，本世纪这100年里共有六次</span></span></strong><span leaf="">，分别是2017年、2025年、2036年、2055年、2074年和2093年。</span></p><p style='text-align: justify; color: rgb(0, 0, 0); letter-spacing: 1px; font-size: 17px; line-height: 1.75;' mpa-paragraph-type="body"><span leaf=""><br></span></p><p style='text-align: justify; color: rgb(0, 0, 0); letter-spacing: 1px; font-size: 17px; line-height: 1.75;' mpa-paragraph-type="body"><span leaf="">很多人将近期的极端炎热天气与闰六月相关联。“闰六月只是一种正常的历法现象，无关气候异常。”杨婧说。</span></p></section></section></section></section><section style='text-align: justify; line-height: 1.75em;'><span style='color: rgb(0, 0, 0); font-size: 17px; letter-spacing: 1px;'><section data-role="paragraph" style='font-family: "PingFang SC", system-ui, -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: medium; letter-spacing: 0.544px; 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