In 2017, people were talking about the astrological sign in the sky, September 23, 2017, saying it fulfills Revelation 12. I don’t know the full significance of this sign in the sky, but I understand that many believe that they will be raptured and saved from this telestial world. I’m not expecting that. But I do find the whole thing fascinating, and I believe that no one knows the timing of the Lord.

And there appeared a great wonder in heaven; a woman clothed with the sun, and the moon under her feet, and upon her head a crown of twelve stars:

And she being with child cried, travailing in birth, and pained to be delivered. (Rev 12)

I read articles about the sign and even tried the software called “Stellarium.” I put in other dates — specifically, I tried September 22, 1827, in New York. For me, that is a historic day. Moroni gave the Golden colored Plates and Urim and Thummim to Joseph Smith on September 22, 1827. So I took a look at the sign of Virgo that is supposed to be the woman in Revelation 12 on that date. I guess you could count at least 12 stars above her head, and Jupiter is exiting her womb, the sun at her shoulder, and the moon (at her hand) not at her feet until the next day – September 23, 1827. Essentially the same setup people are talking about as the sign on September 23, 2017. But I think there are other dates when someone could essentially say that Rev 12 is in the sky. Even in 2020, it appears that Virgo will have the sun in the same place, and the moon below her feet. So, this does not seem to be any indication of fulfilling Rev 12.
September 22, 1827:
September 23, 2020:

Autumn Equinox

The day Joseph got the plates happened to coincide with an astrological event —  the Autumn Equinox  — when there is about the same hours of sunlight as there is night, hence the Latin name “equinox”— or equal night. September 22 is also the Autumn Equinox in 2017.

Rosh Hashanah

September 22, 1827, also coincided with the Jewish celebration of Rosh Hashanah, or Feast of  Trumpets (also called The Day of Remembrance), which began in 1827 on the evening of September 21 at sundown. (On the Judaic calendar, this was the first day of the seventh month called Tishri–the new day beginning at sunset. Remember that each day starts at sundown on the Jewish calendar.) The Feast of the Trumpets continued on September 22, 1827. It is a two-day celebration.
In the year 2017, Rosh Hashanah began at sundown on Wednesday, September 20, 2017, culminating at dusk on Friday, September 22, 2017.

Harvest Moon

We also have the “harvest moon” in September or October on or near the Fall Equinox, which has to do with the gathering in of the last crop harvest. Farmers worked through the night by the light of the full moon. In 2017, the harvest moon was October 5, which is the first full moon nearest the Fall Equinox. In 2016, the Harvest Moon was a Supermoon. I think in 1827, the harvest moon was October 5, as the year 2017, since that was the next full moon that year.

Joseph Receives Plates

Joseph and Emma went to the Hill Cumorah on the night of September 21, 1827, which coincided with the Feast of Trumpets. According to Joseph Knight, who was in the Smith home on that evening, he saw Joseph preparing to get the plates.
The angel had commanded Joseph to come to the hill on September 22. To be precise in his compliance and still to throw off meddlers who knew of the date, Joseph chose to go to Cumorah in the dead of night, almost the minute September 22 arrived. (Bushman, Rough Stone Rolling, pg. 59)

The Trumpet and Shofar

Interestingly, we have the symbol of Moroni blowing the trumpet on the temple. (Most temples have the angel Moroni on top, but eight do not.)
“In the seventh month, in the first day of the month, shall ye have a sabbath, a memorial of blowing of trumpets” (Lev. 23:24)
The traditional trumpet is called the shofar, and it’s a ram’s horn. The sound is lovely. My son gave me one, and he can make it work (which is not that easy.) Maybe Moroni should have a shofar in his hand instead of a modern-day trumpet.

Shofar

The sounds of the shofar are to remind God’s people of their relationship with God as well as God’s promise to remember His people. It is also a call to repentance before the Day of Atonement.
The Feast of Trumpets celebrates the final season for the gathering in of the wine and oil — it is the last harvest.
“For behold the field is white already to harvest; and lo, he that thrusteth in his sickle with his might…”(D&C 4:4)
It also marks the day that God remembered his covenant people–A Day of Remembrance. Many Jewish scholars believe that the blowing of the trumpet signals the return of scattered Israel.
“One Jewish commentator has said, ‘Expectantly, we await the sounding of the Trumpet of Liberation, when Zion will be free to receive its exiled children from all parts of the earth. ‘”(Ensign)
It also commemorates the creation and fall of  Adam and Eve and their covenant relationship with God. Adam and Eve learned how to return into the presence of God, through repentance. The blowing of the shofar may even signify the coronation of the King of the Universe — God.
The Kabbalists teach that the continued existence of the universe is dependent upon the renewal of the divine desire for a world when we accept G‑d’s kingship each year on Rosh Hashanah. (ref)
On Rosh Hashana (The Feast of Trumpets), God writes the names and fates of the people in The Book of Life. Then begins ten days of repenting and forgiving, which culminates on Yom Kippur, the Day of Atonement. At the close of Yom Kippur, the repentant hope to stand absolved before God. He will then seal his verdict in the Book of Life. Following these two High Holy Days is the Feast of the Tabernacles.
The priests blew the shofar in the evening of September 21, 1827, and again on the 22nd — and Joseph was preparing to receive the Gold Plates, opening the dispensation of the Fullness of Times, when God extended his mercy and remembered his covenant people. And His people remember Him.