I examine near term (fewer than 43 days from today) prophecy in detail at “The Rescue of the Bride” http://october-5-2017.com
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The gathering of believers who comprise The Great Multitude in White Robes (Revelation 7:9ff) will take place between September 5, 2017 and October 5, 2017. September 5, 2017 is the start of The Great Tribulation. October 5, 2017 is Sukkot, also known as the Festival of Tabernacles, also known as the Festival of Ingathering.
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The Great Multitude in White Robes come out of The Great Tribulation (Revelation 7:14), so their gathering cannot occur before the start of The Great Tribulation (September 5, 2017).
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The Great Multitude in White Robes will be in the throne room in heaven no later than the Festival of Ingathering on October 5, 2017. Look at what they are holding in their hands - palm branches! Palm branches are required for the Festival of Ingathering (Leviticus 23:40).
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The Great Sign of the Woman appears on September 23, 2017 exactly at sunset in Jerusalem - exactly at the end of Rosh Ha Shanah, exactly at the time of the blowing of “the last trump.” [The two (2) day observance will start one day late this year.] This may be the “rescue/rapture” date. We see the first evidence that the “rescue/rapture” has occurred when “The Great Multitude in White Robes” [Revelation 7:9ff] appears in the throne room of Yahuah (God) twelve (12) days later just after the opening of the Sixth Seal on October 5, 2017. These events allow us to unlock the timeline of the Book of Revelation.
“The Great Sign of the Woman appears on September 23, 2017 exactly at sunset in Jerusalem - exactly at the end of Rosh Ha Shanah, exactly at the time of the blowing of ‘the last trump.’”
The event on September 23 does look like what is described in Revelation to me as well.
However, it is a very big stretch to start matching up all of these other events to the dates you’ve given.
Where is the sign of the dragon that appears with the woman?
There are several things that will take place exactly in the middle of Daniel’s seventieth week. In my understanding, these include:
The abomination of desolation will be set up in the temple.
The two witnesses will be killed (and raised, and caught up to God).
Satan will be evicted from the 3rd Heaven permanently by Michael, the archangel.
Persecuted saints in Revelation 5 will be given their white garments and enter into rest. (I base this on the alignment between this chapter and the Olivet discourse.)
A worldwide persecution of Christians and Jews by the anti-Christ will begin.