Jesus was born in the 7th month. The scripture alone declares it.

Do read the following article listed.  KNOW that the TRUTH is revealed from the scripture alone.  Yes, there are various interpretations who even use the Qumran(Enoch calendar to determine this and that) to try to justify that Jesus was born in the Spring or any other month.  BUT one NEEEEEEEDS to rely on the scripture, even MORE than upon the traditions of men, calendars of men, astronomy conditions and so forth. The SCRIPTURE is what reveals the ultimate truth!  The Gregorian dates may be off a little bit, the Jewish calendar dates may be a little off and so forth......but it is TRUE that JESUS WAS born in the 7th month!

http://christinprophecy.org/articles/when-was-jesus-born/

For more studies about Jesus Birth (which we really shouldn't focus heavily on birth, but on resurrection) click this link.

The announcement of the birth of the King of Kings from the Tribe of Judah comes at the time of the announcement of the "king plant" Jupiter arriving in conjunction with the star Regulus.