Nun ן נ is the letter of the month of Cheshvan חשון

Hebrew Calendar: Wed, 29 October 2008 - 30th of Tishrei, 5769 - Rosh Chodesh Cheshvan (the new moon of the month of cheshvan)So Tuesday night was Rosh Chodesh Cheshvan, the last day of Tishrei, and tonight will be (I"H) the first day of Cheshvan. Is that confusing, or what? Rosh Chodesh this year is two days this month--one day in Tishrei and one day in Cheshvan.

Nun is the letter of the month--it represents Moshiach. It is bent in galut (exile) and is upright when Redemption comes. Got the letters from Chen's keyboard: ן נ
The long, vertical one is the final form used, at the end of the word. The sound is /n/.

These words' spiritual meanings are related to each other because their numerical values are the same, via their shared gematriya:
נחש [naxash] snake 358 = n/50 + x/8 + sh/300
מש'ח [moshiax] Moshiach 358 = m/40 + sh/300 + i/10 + x/8
The spiritual force of the snake is harnassed for good by the spiritual strength of Moshiach.

This is the 8th month of the year, counting from Nissan. (You can see this in the English month of October, which has the number 8 in it.--from Rabbi M. Kosman) Of course, if you count from Tishrei, then cheshvan is the second month.

The sense of the month is smell. Only that sense refrained from sinning in the Garden of Eden. That sense has a direct line to the soul, which experiences the joy of the sense. On Yom Kippur we refrain from using our sense of taste, but we can use our sense of smell. "The Hebrew word for "smell" (רֵיחַ) is cognate to the word for "spirit" (רוּחַ)."(from web-site below) [reax] and [ruax]

Take the first and last letter of חשון Cheshvan
and you have xen, what is pleasing חן
the middle two letters are like isha (woman), so that we learn that the month of Cheshvan contains the essence of a woman's xen - goodness. Thus, it is no surprise that the yahrzeit of Rachel(the anniversary of the death of Rahel Imenu) falls in this month, on the 11th of Cheshvan.

This month evokes the flood, as its duration was the solar year extending form the 17th to the 28th of the month.

From rosh chodesh shiur (lecture) of Rtn. Sara Leider.
More details on the organ, color, and zodiac sign of the month can be found on The Month of Cheshvan According to the Book of Formation (Sefer Yetzirah) .
Dedicated to the memory of Cousin Laura, whose soul finished its journey in this world as this month began.