Cheshvan

Cheshvan
The Great Flood, which according to the Bible wiped out the world, started in Marcheshvan.
Native name	מַרְחֶשְׁוָן‎ (Hebrew)
Calendar	Hebrew calendar
Month number	8
Number of days	29 or 30
Season	Autumn (Northern Hemisphere)
Gregorian equivalent	October–November
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Marcheshvan (Hebrew: מַרְחֶשְׁוָן‎, Standard Marḥešvan, Tiberian Marḥešwān; from Akkadian waraḫsamnu, literally, 'eighth month'), sometimes shortened to Cheshvan (חֶשְׁוָן‎, Standard Ḥešvan Tiberian Ḥešwān), is the second month of the civil year (which starts on 1 Tishrei), and the eighth month of the ecclesiastical year (which starts on 1 Nisan) on the Hebrew calendar.

In a regular (kesidran) year, Marcheshvan has 29 days, but because of the Rosh Hashanah postponement rules, in some years, an additional day is added to Marcheshvan to make the year a "full" (maleh) year. Marcheshvan occurs in October–November in the Gregorian calendar.

The Hebrew Bible, before the Babylonian Exile, refers to the month as Bul (1 Kings 6:38). In Sidon, the reference to Bul is also made on the Sarcophagus of Eshmunazar II dated to the early 5th century BC.