(Either that, or my phone briefly had a very incorrect time setting.)
For Unix, it's Jan 1, 1970.
For DOS, I believe it's Jan 1, 1900, though with a leap-year error (there is a Feb 29, 1900 included that shouldn't be).
For SAS (statistical software), it's Jan 1, 1960.
Apple should use the Unix Epoch.
Curious.
(Either that, or my phone briefly had a very incorrect time setting.)