WHAT IS SPECIFICALLY UNIQUE ABOUT A PARTICULAR YEAR THAT THE LORD CALLS IT "THE ACCEPTABLE YEAR OF THE LORD" ?

The Scriptures tell us that the rapture will occur during "The acceptable year of the Lord".  

There is something about a particular year that is so distinctively unique that it makes it different from most other years.  The Lord calls that unique year “the acceptable year of the Lord “.  I believe there are three related Scriptures, that together identifying the "acceptable year of the Lord".  During the “acceptable year of the Lord” God will first take out His vengeance upon Israel and then rapture His Church in that same year. These three related Scriptures are recorded in :

 Matthew 24:15-16 (Jesus speaking )

"When ye therefore SHALL SEE the abomination of desolation , SPOKEN OF BY DANIEL THE PROPHET ,.......THEN let them which be in Judea FLEE....."

Jesus tells the Jews in Judea to BEGIN TO FLEE when they "SHALL SEE” the "ABOMINATION " that is about to cause the "DESOLATION" of Israel. That abomination is the Gog-Magog Army encompassing Israel while waiting for the command to attack and invade Israel according to :  Luke 21:20-22 .

Matthew 24:20 ( Jesus speaking )

"But pray ye that your FLIGHT be NOT IN WINTER, neither on THE SABBATH DAY."

The phrase "not in winter" means "your flight" will BEGIN AFTER WINTER is over, either on or after the Spring Vernal Equinox which is the FIRST DAY of Spring that ALWAYS occurs on March 20th of every year. 

Jesus also says check to see what the Prophet Daniel has to say about the abomination of desolation  in :

Daniel 12:11 ( Jesus  refers us to this Scripture )

"From the time that the abomination that maketh desolate IS SET-UP there shall be 1,290 DAYS."

SO, THERE YOU HAVE IT :

There are VERY FEW exceptionally unique years in which the 1,290 day-count begins in Spring ON OR AFTER the Spring Vernal Equinox , and also ENDS on the day of the New Moon of Tishri 1, Feast of Trumpets 1,290 days later.  Next year, 2021 is one of those exceptionally unique years. Next year, the Spring Vernal Equinox occurs on Saturday March 20, 2021 , and the 1,290 day-count begins three days later on Tuesday March 23, 2021 which IS NEITHER IN WINTER NOR ON THE SABBATH as Scripture requires. 

If that is the Lord's definition of "THE ACCEPTABLE YEAR OF THE LORD", the year 2021 qualifies as a unique year. If 2021 is the “acceptable year of the Lord”, then the rapture will occur thirty ( 30 ) days later on Nisan 10, April 22, 2021. That would give us, who are watching , a thirty (30 ) day warning from the day we see the abomination of desolation set-up to the Day of the Rapture. 

According to Your Word , come Lord Jesus !