Do you want your brain to hurt? Really?  Maybe I can help !  >
Yes, the hard thing about the Hebrew calendar is that the Hebrew year
is 360 days. However, but, well, then again it isn't   Let me
explain. You see, in order to get the spring planting done in a timely
fashion, the Hebrews would have to add a month, literally a "leap
Month" to their calendar once every generation or so to bring their
360 day luna calendar up to coincide with the actual Solar calendar!
And yes, that month has a name! This is really important so as to get
the spring planting done on time!
   Back when the nation and temple existed, that may have not been an
issue. However in their 19 century long diasporia? ...
   Anyway, Prophetically, this gives us an interesting issue. Now,
everyone who is nose deep into prophecy knows that due to Ezekiek
4:4-6 and Leviticus 26:27,28, the resulting 2520 years, or 907,200
days of chastisement after the Babylon capitivity ended,(which was
about 537BC), Israel became a nation on the 201st day being  May
14th,1948 using 360 day years.
   The fly in the ointment, however, is the month the Jews added
occasionally to bring their calendar up to coincide with the actual
solar calendar is seemingly  not considered in Bible prophecy!
   Why, we don't know. But is an interesting point for history geeks like me!
Lewis