In order for Jesus to return on the Feast of Trumpets on 9/21/2028, the 1st day of the Antichrist's reign of 1260 days would have begun on 4/11/2025, so it doesn't look like the Lord is returning to Earth on 9/21/2028.

In order for Jesus to return on the Feast of Trumpets on 9/10/2029, the 1st day of the Antichrist's reign of 1260 days will begin on 3/31/2026.

As for Jesus return on the Feast of Trumpets on 9/27/2030, I eliminated that year because the day of His return as I explained in my 5/18 post  HOW JESUS CAN FULFILL THE FEAST OF TRUMPETS WHEN HE INDICATED HIS RETURN WILL BE IN THE SUMMER & IN THE WINTER that "If Jesus came in 2030, it wouldn't be in the summer before the Fall Equinox.  It would be after the Fall Equinox that begins on 9/22 or 9/23.  So He wouldn't be coming during the summer because the Eve of the Feast of Trumpets begins on 9/27/2030, and the 1st Day of the Feast of Trumpets is on 9/28/2030.  Here is the Jewish calendar for 2030 at Jewish Calendar 2030 Diaspora - Hebcal "

In order for Jesus to return on the Feast of Trumpets on 9/18/2031, the 1st day of the Antichrist's reign of 1260 days will begin on 4/07/2028.

In order for Jesus to return on the Feast of Trumpets on 9/06/2032, the 1st day of the Antichrist's reign of 1260 days will begin on 3/27/2029.