[ETL]

I always get a chuckle whenever anyone mentions “years” as a time reference in these scenarios. What was a “year” before earth’s orbit around the sun existed?

As a unit of time, it's still basically valid, given that distances to the furthest regions of space are determined via the light-year, the distance light travels in a year at its speed of 186,000 miles per second. Granted, there are a lot of seconds in 11.7 billion years (13.7 - 2.0 = 11.7).

[fwdude]

Once again, your point of reference is a “year,” which is actually an event: the earth making one trip around the sun.