When did the events of NOAH begin and end?

 Read GEN chapter 7.

Notice the TIMES mentioned in the passage, both the number of days AND the event of time.

Gen 7:4  For yet seven days, and I will cause it to rain upon the earth forty days and forty nights; and every living substance that I have made will I destroy from off the face of the earth. 

Gen 7:6  And Noah was six hundred years old when the flood of waters was upon the earth.  (just the number of YEARS NOAH happened to be)

Gen 7:11  In the six hundredth year of Noah's life, in the second month, the seventeenth day of the month, the same day were all the fountains of the great deep broken up, and the windows of heaven were opened.  (notice the MONTH listed as a biblical month of the "second month")

Gen 7:12  And the rain was upon the earth forty days and forty nights. 

Gen 7:17  And the flood was forty days upon the earth; and the waters increased, and bare up the ark, and it was lift up above the earth. 

Gen 7:24  And the waters prevailed upon the earth an hundred and fifty days. 

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The bible clearly indicates events of Noah "in the second month" on the 17th day of the month.

When is the "second month"?  Using a QUMRAN CALENDAR method of calculating time, the second month is ALWAYS after the timing of "the ABIB."  ABIB 1 NEVER takes place prior to the SPRING EQUINOX.  That is THE rule according to the QUMRAN calendar.  In CYCLE 1, ABIB 1 occurs WHEN the first FULL MOON of AFTER the SPRING EQUINOX year occurs.  Even the FACT that BARLEY HARVEST should take place prior to PASSOVER is basic "farmer's almanac" math.

In CYCLE 1 the FIRST FULL MOON is ABIB 1 so IYYAR 17 is 2 WEEKS PRIOR to the 3rd FULL MOON after the SPRING EQUINOX.  Gen 7:4  For yet seven days, and I will cause it to rain upon the earth.  Basically the END of the 7 DAYS of GEN 7:4 is 2 weeks prior to the 3rd FULL MOON after the SPRING EQUINOX.  The next day is IYYAR 17 beginning the 40 days and nights of RAIN.  The END of the RAIN is 3 days prior to the FULL MOON of the 3rd month or the 4th full moon of the year.

In CYCLE 2 the FIRST FULL MOON after the SPRING EQUINOX is on the PASSOVER date on the 14th of ABIB, so IYYAR 17 is on the first day of the week prior to the SECOND FULL MOON after the SPRING EQUINOX.  One week of "GEN 7:4 rain" would occur prior to IYYAR 17 FULL MOON.  The END of the RAIN is 7 days AFTER the 3rd FULL MOON of the year.

In CYCLE 3 the FIRST FULL MOON after the SPRING EQUINOX is 10 days after ABIB 1, which is what they call "when the lamb was taken."  The SECOND FULL MOON of the year is when the RAIN begins in "GEN 7:4 rain."  IYYAR 17 is one week after the SECOND FULL MOON.  The END of the RAIN is 2 weeks PRIOR to the FULL MOON of the 4th month or the 4th full moon of the year.  Or another way to say it is the END of the RAIN is 2 weeks and 4 days AFTER the 3rd moon (the moon of the 3rd month) of the year.

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The time for the fall-feasts based on NOAH?

Just some "bible math".... ****Did you know there are 7 Full moons between Abib 1 and Fall Feasts (If a person uses Jewish calendar that begins ABIB 1 after Spring Equinox).  Noah: Gen 7:11  In the six hundredth year of Noah's life, in the second month, the seventeenth day of the month, the same day were all the fountains of the great deep broken up, and the windows of heaven were opened.  AND Gen 7:24  And the waters prevailed upon the earth an hundred and fifty days.   A possible pattern based on Qumran method....Every 3 years the last of 7 moons has this pattern: Cycle 1 FM is 2 weeks prior to Atonement; Cycle 2: FM is start of Feast of Tabernacles; Cycle 3: FM is 5 days after trumpets, 1 week before end of Noah's 150 days, and 6 days before Atonement. ****If Jesus was on the cross in 31 AD, Stelarium shows the "almighty God planet" (Jupiter) astronomical position below the constellation "the lamb."  Sun is also below "the lamb."  (see photo below).  The NEW MOON was below the lamb on 4-10-31 AD.  By calculating the number of years since NOAH..... I looked up a "bible time line" . The possible time of NOAH is EXACTLY 3 * 777 years PRIOR to 31 AD.  The time of Noah would be about -2300 AD...... (I don't know how they write it but 2299 BC??).  The PATTERN of 777 * 3 really stands out in the crowd.

I just fiddle around with observing things from Stelarium....but I noticed how the "saviour planet" (Mercury) was exactly positioned one day in movement of the moon prior to the MOON STANDING over the PASSOVER LAMB (sun positioned below the lamb).  Maybe the positions of planets line up with things.  I've heard the SAME thing about the probable time of JESUS' birth in the FALL (during the FALL FEASTS....and observations of the "morning star")..... look for a BRIGHT conjunction STAR in the FALL  on STELLARIUM.

WHAT cycle would you possibly use to calculate using QUMRAN CALENDAR method of CALCULATING time?  START with AD 31 as a time to USE CYCLE 1 in the QUMRAN CALENDAR (Basic math of what events happened in STELARIUM..... MOON and SUN located below AIRES....along with JUPITER planet).  CALCULATE by adding three years after that or subtracting 3 years to indicate use of CYCLE 1.  SURE SURE the Qumran Calendar DOES use a "7 year" leap year and every 28 years "leap year" as well....but just coordinate with SOME form of SIMPLE math and don't make things so complex when BASIC MATH will prove..  this or that.

Even IF these things "don't make sense"....its OK.... the HOLY SPIRIT was in-dwelling in people's hearts and minds BEFORE the ACCESS to the QUMRAN CALENDAR!  Yes, it would have been "probable" to coordinate to IYYAR 17...... in a "Reasonable" understanding of when that time would have been back before access to such a document.  For Example: the REFORMATION

GLORY to GOD in the HIGHEST.....the HEBREW LANGAUGE.....itself has "Noah conditions"....aka GIMEL is CAMEL....