[Fresh Wind]

"BP" (Before Present) makes the most sense.

Except that every year it changes.

[ETL]

Re: "BP" (Before Present)

Except that every year it changes.

You're right. I was, for some reason, thinking about paleontology, which deals in millions of years. But even there, way down the line, or even with ice-age period stuff now, a thousand years, sometimes less, matters.

[Varda]

“”BP” (Before Present) makes the most sense.
Except that every year it changes.”

Actually it doesn’t. Archaeology defines the present as 1950.