The first dispensation (distribution) of divine blessings was CREATION (the six episodes/steps of creation lasted millions/billions of years=TIME).
Jesus came to earth in the completion/end of time...
Gal 4:4
But when the fulness of the time was come, God sent forth his Son, made of a woman, made under the law,
Also in Ephesians 1:10?.
The age of time ended and Jesus began the AGE OF ETERNITY, THAT IS WHY THE SABBATH IS NOT A time event ANYMORE, IT IS eternal (THIS IS the lord's day).