中国历法和犹太历法都是阴阳合历（Lunisolar Calendar)

 

The Hebrew calendar is a lunisolar calendar, meaning that months are based on lunar months, but years are based on solar years. ... (These extra months are added seven times every nineteen years. See Leap months, below.) The beginning of each Jewish lunar month is based on the appearance of the new moon.

19年有7个闰年，一模一样。