Matthew 24: 36 - 37: But of that day and hour knoweth no man, no, not the angels of heaven, but my Father only. But as the days of Noe were, so shall also the coming of the Son of man be.
Jesus Himself did not know the time of the translation when He spoke these words; but when He ascended then the Father made this thing known to Him (Revelation 1: 1: The Revelation of Jesus Christ, which God gave unto him, to shew unto his servants things which must shortly come to pass; and he sent and signified it by his angel unto his servant John:).
Jesus directed the disciples’ attention to the days of Noah to show how the coming of Christ would be at the end time.
Genesis 6: 13 - 21 is Noah building an Ark according to the pattern that God showed him by vision; Noah did not know when the Flood would happen, but by faith he built in preparation for when God would reveal that specific time.
Enoch’s son named “Methuselah” was Noah’s timepiece by whom Noah could gauge the lateness of the hour, for “Methuselah” means in Hebrew, “His death shall bring (the Flood)”. As Noah had a timepiece, so does the Bride have a timepiece: Israel.
Genesis 7: 1 - 4: And the LORD said unto Noah, Come thou and all thy house into the ark; for thee have I seen righteous before me in this generation. Of every clean beast thou shalt take to thee by sevens, the male and his female: and of beasts that are not clean by two, the male and his female. Of fowls also of the air by sevens, the male and the female; to keep seed alive upon the face of all the earth. For yet seven days, and I will cause it to rain upon the earth forty days and forty nights; and every living substance that I have made will I destroy from off the face of the earth.
God revealed to Noah the date of the Flood seven days beforehand, on May 10, 1656 years after the Fall; then on May 17, the Flood began (Genesis 7: 11).
God will reveal to the Bride the date for Her body change shortly before it happens, for this was the pattern that Jesus directed the disciples to for them to understand the timing of the translation.