How long does the Jewish month September-October last?

Answer 1

There is no such month on the Jewish calendar as September-October. The Jewish calendar is an ancient lunar based calendar which does not coincide with our modern calendar. Hence, Jewish holidays fall at different times each year when compared to the modern calendar. The months of Elul and Tishrei usually fall around September and October. This year, for example, the Jewish month of Elul began on August 21, 2009 and ended on September 29, 2009. The Jewish month of Tishrei bega on September 30, 2009 and will end on October 18, 2009. The Jewish month of Chesvan then begins on the 19th of October.

Answer:

Tishrei contains 30 days and corresponds to late September-mid October.