“What is TIME?”
It’s what ‘passes’ between events caused by matter. Were there no matter, there would be no time...
How do I answer the question-
Why do you think we are alone in the universe?
Because we’ve never rec’d a radio signal saying— 3.14 etc etc etc
>>Were there no matter, there would be no time...
Time is a derivative function of state change that progresses relative to E within the inertial frame(s) in which it is observed.
Matter did not exist yet and was not required for the state of E to change between T0 and T0+3 minutes...
“1 second - 3 minutes - Formation of light nuclei”
http://www.einstein-online.info/elementary/cosmology/early_universe