Day of Creation

The Day of Creation, also referred to as the Dawn of Creation, was the day on which the mentally reprogrammed Operation Ark colonists were awakened from cryogenic suspension on Safehold and, as far as these "Adams and Eves" were concerned, the day the universe was created.

The fact that each and every Safeholdian knew exactly on which day the universe began was helping the credibility of their religion along a lot.