Listen to Part 6:
Imagine standing beneath the night
sky in ancient Israel with no printed calendar hanging on a wall, no
application calculating feast dates years in advance, and no astronomical
tables sitting on a bookshelf. Above you are the lights God placed in the
heavens. Around you are fields whose ripening grain bears witness to the
changing season. The moon marks its course, the sun governs the day, and Israel
is commanded to meet with God at His appointed times. At first glance, it seems
beautifully simple.
Then we begin counting.
Up to this point, our primary
question has been whether the moon resets the weekly Sabbath. But once we
seriously examine the biblical calendar, another question emerges, and I
believe it is essential to understanding why calendar discussions have become
so complicated in the first place: What if the heavens have not always
operated exactly as they do today?
Today, twelve lunar months do not
equal one solar year. A lunar month averages approximately 29½ days, so twelve
lunar months total roughly 354 days. The present solar year is approximately
365¼ days. That leaves a difference of about eleven days every year. If nothing
were done about that difference, the lunar months would steadily move backward
through the seasons. After only a few years, the month associated with Aviv would
no longer remain where it belonged agriculturally. Given enough time, Passover
would migrate through every season of the year.
This is why the thirteenth month
matters, and this is one area in which the work of At the Foot of the
Covenant (ATFOTC), the Messianic fellowship in South Africa I introduced
earlier, has been particularly valuable to me. Their detailed study of the
thirteenth month helped me understand that intercalation should not simply be
dismissed as a later religious invention. There is a genuine astronomical
problem that must somehow be reconciled: the biblical months are lunar, but
twelve lunar months under the present heavens do not fill the present solar
year.
Jack Finegan explains that same
underlying problem from the historical side. A lunar year of approximately 354
days falls short of the solar year of approximately 365¼ days, requiring
periodic adjustment if lunar months are to remain connected with their proper
seasons. Finegan discusses evidence for intercalation—the addition of an extra
month—in connection with agricultural and astronomical observation, while more
systematic methods of computation developed later.
That distinction matters.
Saying an additional month is sometimes necessary is not the
same thing as saying the later fixed Jewish calendar, in all of its
details, was given at Sinai. I do not believe we have to accept every later
rabbinic calculation in order to recognize the problem the thirteenth month
solves. Torah does not have to contain the later name “Adar II” for the
astronomical problem to exist. If the months are lunar and God's appointed
times must remain in their proper seasons, then under our present heavens the
lunar and solar cycles somehow have to be reconciled.
Once I understood that, however,
another question became unavoidable for me: Why are those cycles out of
alignment in the first place?
This is where Noah becomes
extremely important. Genesis 7:11 tells us that the Flood began on the
seventeenth day of the second month. Genesis 7:24 says the waters prevailed
upon the earth for 150 days, and Genesis 8:3 repeats that period. Then Genesis
8:4 tells us that the ark rested on the seventeenth day of the seventh month.
From the seventeenth day of the second month to the seventeenth day of the
seventh month is five months, and Scripture gives the elapsed period as 150
days. That gives us thirty days per month. Extend the same structure across
twelve months, and we have a 360-day year.
That number is not being imported
into Genesis from some outside calendar theory. The pieces that produce it—the
five-month interval and the 150 days—are both in the biblical chronology. I
believe that reflects something important about the year as it actually existed
in Noah's time.
Modern scholarship has also
recognized the unmistakable 360-day structure in the Flood chronology. Jonathan
Ben-Dov, writing in Harvard Theological Review, argues that the
Flood narrative employs thirty-day months within a 360-day annual framework and
discusses archaeological evidence that a 360-day schematic system was known in
Iron Age Judah. Ben-Dov interprets that evidence as a schematic calendrical system
rather than proof that the physical astronomical year was literally 360 days,
so his conclusion is not identical to mine. But his research is useful because
it independently confirms an important point: the 360-day structure
really is present in the biblical material.
I take the evidence further. I
believe the earlier year was actually 360 days. That conclusion helps
make sense of the remarkable order we see in the earlier biblical pattern.
Twelve months of thirty days produce a complete 360-day year without requiring
the kind of periodic adjustment necessary beneath the heavens we observe today.
Yet something is clearly different
now. Our lunar months are not thirty days each. Our solar year is not 360 days.
Twelve lunar months do not complete the solar year. So the question naturally
becomes: When did that change occur?
This is where the extraordinary
sign given to Hezekiah becomes important to me. Hezekiah is gravely ill when
Isaiah brings him the devastating message that he is going to die. Hezekiah
turns his face toward the wall and prays. God hears him, adds fifteen years to
his life, and gives him a sign confirming the promise. What follows is one of
the strangest signs involving the heavens recorded in Scripture.
According to 2 Kings 20:8–11,
Hezekiah is given a choice concerning the movement of the shadow upon the steps
of Ahaz. Rather than choosing the ordinary forward progression of the shadow,
he chooses the extraordinary sign. Isaiah cries out to God, and the shadow
retreats ten steps. Isaiah 38:7–8 records the same event, describing the shadow
cast by the sun moving backward over the ten steps it had already descended.
Whatever physical mechanism God
used, the observable event recorded by Scripture is remarkable: the
normal progression of the shadow was reversed. I do not believe this
should be treated as a curious but insignificant miracle tucked into Hezekiah's
story. God chose a sign involving the measurement of time itself to confirm His
promise to the king, and for me that becomes especially significant when it is
placed beside the earlier 360-day pattern and the calendrical conditions we
experience afterward.
There is a calculation sometimes
presented in connection with Hezekiah's sign that attempts to relate the
ten-step reversal to approximately five additional days in the year. I
understand why that calculation is attractive, but I do not think our conclusion
needs to stand or fall upon it. Scripture speaks of ten steps, while some
translations use language such as degrees, and we do not possess the steps of
Ahaz or know their precise geometry. We are not given a technical description
of the structure involved. I would rather build the case from the larger
biblical pattern than make an uncertain modern calculation carry the argument.
And that larger pattern is what I
find compelling. We have an earlier biblical chronology built around thirty-day
months and a 360-day framework. We then have an extraordinary event during
Hezekiah's lifetime in which the normal movement of the sun's shadow is
reversed. We presently live under a year of approximately 365¼ days, producing
a lunar-solar discrepancy that requires periodic intercalation. Then, as we
will see, biblical prophecy again gives us periods that fit a 360-day
framework.
I believe those pieces belong
together. My conclusion is that the biblical evidence points toward an
earlier 360-day year and that the extraordinary sign given to Hezekiah is
connected with the change that resulted in the calendrical conditions we
experience today. I want to be precise only at one point: Scripture records the
shadow moving backward, but it does not give us a technical astronomical
explanation of exactly what happened to the earth-sun system or state in one
sentence that the year changed from 360 days to approximately 365¼ days. That
connection is the conclusion I draw from the larger biblical and calendrical
pattern. Recognizing where the text ends and my conclusion begins does not
cause me to abandon that conclusion. It simply keeps me from putting words into
Scripture that are not actually there.
Once we return to the heavens as
they presently operate, the reason for the thirteenth month becomes much easier
to understand. Twelve lunar months total approximately 354 days, while the
solar year is approximately 365¼ days. After one year, the lunar count is
roughly eleven days short. After two years, that difference has accumulated to
roughly twenty-two days. After three years, it is approaching thirty-three
days—roughly another lunar month. Without some means of correcting that drift,
the biblical months would gradually move away from the seasons in which
Scripture places the appointed times.
That is why an additional month
periodically becomes necessary within a lunisolar calendar. Finegan explains
that ancient peoples using lunar months had to reconcile those months with the
solar year and that one solution was the periodic insertion of another month.
The Babylonian system eventually employed a highly organized intercalation
pattern in which seven additional months within nineteen years kept the lunar
calendar closely aligned with the solar year. Finegan also notes historical
questions surrounding when systematic computation was adopted within Jewish
practice. We should not take a fully developed later system and simply assume
Moses used every component of it, but neither should we pretend that the
astronomical problem solved by intercalation does not exist. The need for
reconciliation arises from the heavens themselves.
Aviv gives us another
important piece of that picture. Imagine an Israelite farmer walking through
his barley field as Passover approaches. He is not merely looking upward at the
moon. He is also looking at the land. Deuteronomy 16:1 instructs Israel to
observe the month of Aviv and keep Passover in that season
because God brought Israel out of Egypt in the month of Aviv.
Exodus 9:31 also uses aviv in describing the condition of the
barley during the plagues. The calendar is therefore connected not merely with
a numbered lunar month but with the agricultural season.
That becomes extremely important
because if Israel simply counted twelve lunar months indefinitely without
adjustment, the first month would move backward by roughly eleven days through
the solar year each cycle. Eventually the month associated with Aviv would
occur in winter, then autumn, then summer. Passover would migrate throughout
the seasonal year, breaking the relationship Scripture establishes between the
appointed month and its agricultural setting.
So when someone says, “We should
just follow the moon,” I believe Scripture gives us a more complete picture.
The moon matters enormously, but the moon does not exist alone. Genesis 1:14
places the lights of the heavens in relationship to signs, appointed times,
days, and years. The month is lunar. The agricultural seasons are connected
with the annual solar cycle. God's appointed times must remain where He
appointed them.
This is why I have found ATFOTC's
work concerning the thirteenth month so helpful. Recognizing the need for an
additional month is not abandoning the biblical calendar. Under the present
heavens, it is what keeps the lunar months from steadily drifting away from the
seasonal setting in which Scripture places the appointments.
And that brings us right back to
the Sabbath question, because recognizing the need for an additional month
does not require the weekly Sabbath to restart. Intercalation
reconciles the monthly cycle with the annual cycle. It does not
alter the weekly cycle. If a thirteenth month is inserted, the
seven-day count can simply continue through that month exactly as it continues
through every other month. There is no additional Sabbath problem to solve
because the week is not being generated by the month.
Under a lunar-Sabbath system,
however, every New Moon requires another weekly reset. A thirteenth month
therefore introduces another monthly reset as well. Once again, we would need
Scriptural instruction explaining that mechanism, and I cannot find it. The
need for intercalation does not strengthen the lunar-Sabbath argument. Instead,
I believe it helps us see why the day, week, month, and year should not be
treated as though they are all manifestations of one cycle. They interact, but
they are not identical. Each serves its own function within God's ordering of
time.
There is another reason I am
unwilling simply to project today's astronomical conditions backward through
every period of biblical history: Scripture itself describes extraordinary
events involving the heavens. The Flood presents a catastrophic transformation
of the earth. Joshua records an extraordinary event involving the sun and moon.
Hezekiah witnesses the shadow moving backward. The prophets describe
disturbances involving the sun, moon, and stars. Isaiah uses the imagery of the
heavens being rolled up like a scroll, Revelation echoes that language, and Yeshua
describes cosmic disturbances associated with what is still to come.
If God created the heavens, He is
not bound by their present configuration. I therefore take seriously the
possibility that the relationship among the earth, sun, moon, and year has
changed before and may change again. That becomes especially interesting when we
turn to prophecy.
Revelation gives us a period
of 1,260 days and also speaks of 42 months. Those
numbers correspond to thirty days per month. Twelve thirty-day months give us
360 days. Suddenly, the same numerical framework we encountered in Noah's
chronology appears again in prophecy. I do not think that pattern should be
dismissed casually. Near the beginning of Scripture we encounter a 360-day
pattern. During Hezekiah's reign we encounter an extraordinary reversal in the
normal movement used to measure time. Beneath our present heavens the year is
approximately 365¼ days, requiring the lunar and solar cycles to be reconciled.
Then biblical prophecy again presents periods corresponding to a 360-day
framework.
I believe there is a pattern here
worth taking seriously. The prophetic relationship of 1,260 days to 42 months
clearly gives us thirty-day months within those prophetic periods. I also
believe the future cosmic changes described by Scripture leave open a very real
possibility that the heavens will again operate according to the 360-day order
reflected earlier in Scripture. We are told of disturbances involving the sun,
moon, and stars and even of the heavens being rolled back like a scroll.
Scripture does not give us the technical astronomical mechanics of how those
events will occur, so I do not need to invent them. What matters here is that
the present configuration of the heavens is not the only configuration
Scripture asks us to consider.
That leaves us with an important
balance. The present condition of the heavens should not be used to
erase the biblical evidence for a 360-day pattern, and the biblical evidence
for a 360-day pattern should not be used to pretend that we presently live
under a 360-day year. We have to live beneath the heavens God has
given us now. That means recognizing the moon, recognizing the year, and
keeping God's appointed times in their proper seasons. When reconciliation
between those cycles becomes necessary beneath the present heavens, it means
understanding why a thirteenth month is necessary.
But none of that gives us
permission to change the weekly Sabbath. The possibility that the year
changed does not mean the week changed. I believe that may be one of
the most important distinctions in this entire study. Even a disruption
affecting the relationship among the earth, sun, moon, and year does not
automatically tell us that an uninterrupted sequence of seven days was
restarted. If we are going to claim that such an astronomical event also broke
or reset the Sabbath cycle, then that claim needs Scriptural evidence of its
own. So far, I have not found it.
And now we have arrived at the next
question naturally. If the calendar required adjustment because the lunar and
solar cycles no longer fit neatly together, how did ancient Israel
determine when an additional month was necessary? Was there always a
fixed nineteen-year cycle? Was the barley involved? Was the New Moon observed?
And when did the calculated Jewish calendar familiar to us today actually
develop?
Those questions can help us
distinguish the biblical need for intercalation from the later
systems developed to calculate it. Our goal is not to force the heavens
into a preferred tradition, whether rabbinic or modern. It is to understand God's
order as faithfully as the evidence allows, refusing both to add instructions
He did not give and to discard patterns He did.
The heavens still declare His
handiwork. The appointed times still belong to Him. And the Sabbath remains
sacred time established by God. If the year has changed, and if it will one day
change again, that does not give us authority to redesign the weekly cycle. The
year and the week are different measurements of time, and Scripture must be
allowed to tell us how each one works.
Next: Part Seven — How Was the
Thirteenth Month Determined, and When Did the Fixed Calendar Appear?
#BiblicalCalendar #360DayYear #ThirteenthMonth #Hezekiah #Intercalation #Aviv #PropheticCalendar #TorahStudy #MessianicBibleStudy #RemnantRevived