今天阅读 go/src/time.go 源码，遇到下面几个常量：

const (
	secondsPerMinute = 60
	secondsPerHour   = 60 * secondsPerMinute
	secondsPerDay    = 24 * secondsPerHour
	secondsPerWeek   = 7 * secondsPerDay
	daysPer400Years  = 365*400 + 97
	daysPer100Years  = 365*100 + 24
	daysPer4Years    = 365*4 + 1
)

对如下两个常量心存疑惑

	daysPer400Years  = 365*400 + 97
	daysPer100Years  = 365*100 + 24

为何不是

	daysPer400Years  = 365*400 + 100
	daysPer100Years  = 365*100 + 25

搜索引擎上搜索无果，遂赴 * 发帖提问。正写着帖子，突然自己想明白了这个问题，遂自答之。
帖子如下：
https://*.com/questions/67681571/in-golang-go-src-time-go-why-daysper100years-365100-24/67681572