Well Grace. I think you may be on to something here on the feasts but everything is either too spread out or too close. There was resurrection on Passover weekend and maybe a future resurrection on a major feast day such as Pentecost in the Tribulation concerning Israel.
There is a reaping of the earth in Rev. 14:14 which must be a resurrection as the Lord reaps the earth which may be the 1335th day of the Tribulation
In another thread we mentioned in Patrick's66 post that Irenaeus, a second generation disciple of Apostle John that Pentecost was of equal signficance with the Day of the Lord.
Here is the reason I believe Pentecost/Shavuot is important:
1) Covenant given at Mt. Sinai (1379 BC, May 25)
(Note: Covenant anniversary May 25, 2020 Floyd Jones murdered and riots broke out over 62 countries.)
2) In the book of Acts, we have the Holy Spirit given in 31 AD
3) The next Shavuot/Pentecost will be for the Wheat Harvest and rapture of the saints. (Most Christians do not know how to know that day and to watch.
Obviously you have a good grasp of the Feast Days.
Matthew 13:30 Let both grow together until the harvest: and in the time of harvest I will say to the reapers, Gather ye together first the tares, and bind them in bundles to burn them: but gather the wheat into my barn.
Rev 14:14 And I looked, and behold a white cloud, and upon the cloud one sat like unto the Son of man, having on his head a golden crown, and in his hand a sharp sickle.
Rev 14:15 And another angel came out of the temple, crying with a loud voice to him that sat on the cloud, Thrust in thy sickle, and reap: for the time is come for thee to reap; for the harvest of the earth is ripe.
Rev 14:16 And he that sat on the cloud thrust in his sickle on the earth; and the earth was reaped.
I propose that both the Matthew and Revelation verses are speaking of Shavuot/Pentecost. The bad news is that the earth is cleansed of the tares first.
Mal 4:1 For, behold, the day cometh, that shall burn as an oven; and all the proud,
(tares) yea, and all that do wickedly
(tares), shall be stubble: and the day that cometh shall
burn them up, saith the LORD of hosts, that it shall leave them neither root nor branch.
Mal 4:2 But unto you that fear my name shall the Sun of righteousness arise with healing in his wings; and ye shall go forth, and grow up as calves of the stall.
Mal 4:3 And ye shall tread down the wicked; f
or they shall be ashes under the soles of your feet in the day that I shall do this, saith the LORD of hosts.
Mal 4:4 Remember ye the law of Moses my servant, which I commanded unto him in Horeb for all Israel, with the statutes and judgments.
Mal 4:5 Behold, I will send you Elijah the prophet before the coming of the great and dreadful
day of the LORD: