[af_vet_1981]

Btw, which calendar do you suppose will be used after the second coming?

A new calendar

But now, after that ye have known God, or rather are known of God, how turn ye again to the weak and beggarly elements, whereunto ye desire again to be in bondage? Ye observe days, and months, and times, and years. I am afraid of you, lest I have bestowed upon you labour in vain. Brethren, I beseech you, be as I am; for I am as ye are: ye have not injured me at all.

...

And I saw a new heaven and a new earth: for the first heaven and the first earth were passed away; and there was no more sea. And I John saw the holy city, new Jerusalem, coming down from God out of heaven, prepared as a bride adorned for her husband. And I heard a great voice out of heaven saying, Behold, the tabernacle of God is with men, and he will dwell with them, and they shall be his people, and God himself shall be with them, and be their God. And God shall wipe away all tears from their eyes; and there shall be no more death, neither sorrow, nor crying, neither shall there be any more pain: for the former things are passed away. And he that sat upon the throne said, Behold, I make all things new. And he said unto me, Write: for these words are true and faithful.

Galatians, Catholic chapter four, Protestant verses nine to twelve,
Revelation, Catholic chapter twenty one, Protestant verses one to five,
as authorized, but not authored, by King James

[Uri’el-2012]

A new calendar

The Feast of Booths (known to some as the ... Also known as Sukkot in Hebrew,
God wanted the Israelites to observe this ... The fulfillment of this great
festival is spoken of in Revelation 21:3,

Seek the face of YHvH in His WORD.

shalom b'SHEM Yah'shua HaMashiach

[amorphous]

A new calendar

It will be new to many.

" And I saw a new heaven and a new earth: for the first heaven and the first earth were passed away; and there was no more sea. "

This Revelation prophecy concerns the times after the 1,000 year reign of Yeshua.

The writings of Paul sometimes seem contradictory. They are complex and not as simple to understand as they first appear. One of the problems is that we don't often take into consideration who he is writing/talking to. We assume he is speaking to us as well. So, context is paramount to understanding Paul.

When I have problems understanding one of Paul's writings, I try to reconcile the words with the Words of the Almighty and Yeshua. If I can't, I go with the words of the latter.

An example: What does "for ever" mean? For one, it depends upon who actually said it. Second, could heaven and earth passing away end "for ever"? Or, does "for ever" carry over into the new heaven and earth?

Lot's of complex questions and no definitive answers. At least not yet - though we are promised more will be revealed at the Second Coming.