“儒略日(Julian Day)”与“儒略历(Julian Calendar/Julian Date)”不同。 儒略历

是 Julius Caesar在45 BC发明的。一年有12个月，大月31日，小月30日，平年2月

有28，日闰年2月则有29日，平均每年有365.25日。-"Julian Day (Julian Day)" and "Julian calendar (Julian Calendar/Julian Date)" different. Julian calendar is Julius Caesar in 45 BC invented. 12 months a year, big 31, Xiaoyue 30, an average year in February there were 28, on a leap year in February there were 29, which means an average of 365.25 days.