"Tishrei corresponds to the Tribe of Ephraim, and Cheshvan corresponds to the Tribe of Menashe. Being that Ephraim and Menashe are the two sons of Joseph, it seems that there has to be some special connection between these two corresponding months. Today - 30 Tishrei - is the exact middle day between the first 29 days of Tishrei and the month of Cheshvan of this year. Hence, at least symbolic,ally, this is the one day in the Jewish calendar that Joseph's sons are closest together as brothers. Accordingly, as explained in Bnei Yissaschar, the future dedication of the third and everlasting Temple will take place during Cheshvan." ~ shimonmatisyahu
"...In modern times, this month has become known as Cheshvan or Mar Cheshvan, which seems to have originated at the time that Jews came back to Israel after the Babylonian Exile. The prefix Mar (which means bitter) is a reference to this month having no festivals or rejoicing, but much suffering for Jews throughout the ages. Also during this month, God brought down the Flood and drowned the world (except for Noach and those with him on the ark.) Mar also means drop and refers to the first rains (the Yoreh), which fall in Cheshvan." ~ Devorah
