Assuming that time zero was the big bang and "time" before that did not exist, what is the term to describe something that has existed since "time" began and will continue till "time" ends. I understand that realistically we might never use this term. (Big bang is just a reference, I just wanted to refer to the "beginning of time")
We have terms like omnipresent and omniscient, for place and knowledge/information, but what about time?
Do eternal or sempiternal correctly define it? Is there a word like omnichronos?