Berean Standard Bible (BSB)
It will be a day known only to the LORD, without day or night; but when evening comes, there will be light.
World English Bible (WEB)
It will be a unique day which is known to Yahweh; not day, and not night; but it will come to pass, that at evening time there will be light.
The F.O.G *
For it will be a unique day that is known [only] to יהוה Yahweh, neither of day nor night, but it will come to pass that at evening time there will be light.
The F.O.G Message *
Young's Literal Translation
And there hath been one day, It is known to Jehovah, not day nor night, And it hath been at evening-time—there is light.