Perhaps you could pass this on to Jean Stepnoski concerning her article from 2011 about Tishri 10 and 11.
http://www.fivedoves.com/letters/oct2011/jeans101-2.htm

Hi, Jean,
I've been doing some calculating and noticed that 70 days from July 23, 2017 is Tishri 11.
62 days from that same date, July 23, is Sept 23, the Revelation 12 sign.
And 7 days later is Yom Kippur (10 Tishri) when the last shofar of the year is blown to usher in the new year.
These numbers -- 70, 62, and 7 -- are reminding me of Daniel 9.
Perhaps the prophesy of Daniel 9 is fulfilled in terms of 70 groups of 7 years, and also 70 years, and also 70 days.

Your article mentioned Sorrow and Great Joy which I find describes both the Day of the Lord and the Day of Christ.
In my research, these days happen either on the same day, or are very close.
I saw your question "Might these be 2 different timelines, only days or weeks apart?" and felt compelled to write.

You might be wondering what is special about July 23.  It is calculated by means of an alternate interpretation of Leviticus 23:16, referring to Pentecost.
Tradition says to interpret Leviticus 23:16 to mean "7 Sabbaths plus an extra day, for a total of 50 days"  In 2017, that date comes out to be June 4.
But some people are saying with good cause that Lev 23:16 is to be interpreted to mean "7 Sabbaths, and then count off an additional 50 days"
That date works out to be July 23, 2017.

I have put a spreadsheet together which has all the rapture scriptures.  You can see it at the below link.  Sheet 2 of that spreadsheet has the scriptures from Leviticus in it.

https://docs.google.com/spreadsheets/d/1Uem8SsgANAsgBOEMSSjKGi1VLWhLQL0nNDiO5z7MdZM/pubhtml

Maybe something here will help spark some ideas.

In the Love of Christ,
Jess P