GC, while you were typing this I edited my post. Have a look at the edited version. I'm taking your comments seriously. The post is the one where I comment on pre-flood reckoning.

If you disagree that's not a problem. I'm asking the readers to weigh the evidence. Are we at the start of Daniel's 70th seven?

GC, you're right that the inspired rule is to round up regarding ages. So we have a couple options. Either assume the pre-flood reckoning is accurate or assume it follows the scriptural rules of age reckoning. If it is the latter, the average error pre-flood would be an added half year per generation. Noah was the tenth generation from Adam so the total pre-flood reckoning would be about 5 years less if you assume the years given are rounded up. That assumption should be looked at carefully though before adopting it.

Mark, it is interesting that William Miller used similar logic to point to 1844, though he had different starting dates. He spoke of 7 types, [1] 7th-day Sabbath, [2] 50-ieth day Sabbath (Pentacost), [3] 7th-week Sabbath, [4] 7th-month Sabbath, [5] 7-th year Sabbath, [6] 50-ieth year Jubilee, AND [7] 50-ieth Jubilee.

It might be useful to say something about the Jewish calendar in 1844 and 2015.

In the late summer of 1844, when the "seventh month movement" kicked in, the Millerites needed to determine the beginning of the seventh month. One choice was September 14, as found on the standard Jewish calendar. The other choice was the new moon a month later.

The Millerites made the latter choice, and Damsteegt's book in the "Words of the Adventist Pioneers" database gives the details. This choice is the basis for the October 22 1844 date for the Day of Atonement.

The years 1844 and 2015 have identical dates on the standard Jewish calendar for the beginning of the seventh month, like this:

9/14/1844 Rosh Hashana 5605

9/14/2015 Rosh Hashana 5776

The reason why the dates are identical is because 2015 is 171 years removed from 1844, and 171 is a multiple of 19, and the Jewish calendar is known to run in a 19-year cycle.

The 19-year cycle is based on the fact that a period of 19 solar years is almost identical to 235 lunar months. The 235 lunar months is based on allocating 12 lunar months for each of the 19 years, for a total of 228 lunar months, and then intercalating an additional 7 lunar months, to make 235 lunar months. The intercalation is required to keep the Jewish holidays from drifting with the seasons, for example Passover in the fall or Tabernacles in the spring.

I don't know if specific dates in any year after 1844 will ever be important prophetically. GC 399.4 makes the argument that the fall types must have antitypical fulfillments at some point, and this was the reasoning for the specific date in 1844.

Whether this applies to the antitypical Trumpets and Tabernacles I can't say.

However, it seems to me that we should keep in mind the calendar choice that the Millerites made in 1844, and ask why they did things this way.

Why can no one determine when the year begins?!

Is it equinox?
Is it barley harvest?

Each person insists they're correct. (Except Mark allows he could be wrong, which isn't the case of the majority)

We talked about a 24 day on a round earth and the international date line. What about siting of the moon on a round earth? And what if the siting of that moon on the round earth determines when the year begins?

= part of the earth started one month, and the other part started the next month.

Then what?