关于当前公历计时误差的问题

关于当前公历计时误差的问题

结论：当前公历计时在3000年后我们与实际的时间大约会相差一天。

当前公历计时的规则大家应该都比较清楚，具体计算规则如下

平年：365天

闰年：366天

具体平年、闰年计算的规则如下图所示

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规则具体描述如下:

能整除400或（能整除4不能整除100）的为闰年如（2000、2004、2008、1996）

一些实际的例子：

能整除400的肯定是闰年（如2000、2400、2800）

能整除100但不能整除400的是平年（2100、2200、2300）

不能整除4的肯定是平年（如1999、2001、2002、2003、2005）

根据上述描述可知在400年里有97个闰年，则总共天数为

365*400+97= 146097

从面可知平均每天的天数为

146097/400=365.2425

根据当前国际天文学观测得出实际地球绕太阳一周的平均时间为365.2422天

所以当前的公历计时法只能说是相对准确的，如果标准时间365.2422天计算则每年实际相差为365.2425-365.2422=0.0003天

也就是说用当前的公历计时法，地球绕太阳一周的时间不变则大约3000年后我们实际的计时天数与计时天数相差了一天。

不过这只是理论计算结果，地球公转的时间只能说是相对稳定，每年可能都由于宇宙外力或内力的作用发生变化，另外3000年是很长的一段时间，所以当前也没人会在乎这个误差。

叶正盛

<chsdate w:st="on" isrocdate="False" islunardate="False" day="16" month="4" year="2005"><span lang="EN-US" style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt"><font size="3">2005-04-16</font></span></chsdate>