Why do (at least some) Messianic Jews celebrate the birth of Jesus on the 15th of Tishri?

In an (attempted) [answer](https://christianity.stackexchange.com/a/35647/10486) to the question of *[Why is Christmas on December 25th?](https://christianity.stackexchange.com/questions/5144/why-is-christmas-on-december-25th)* from the perspective of Messianic Judaism, it was stated that Messianic Jews believe that Jesus (Yehu’shua HaMashiach) was born on the 15th of Tishri (falling in late September or early October in the Western calendar). What is the justification for this belief? Is it a widespread belief in Messianic Judaism or only held by a minority? Is there any historical evidence that this belief was held prior to the 19th century?