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The universe started in 1970. Anyone claiming to be over 38 is lying about their age.
Transcript
[Cueball sits at a computer, staring at the screen and rubbing his chin in thought. A friend stands behind him.]
Cueball: Weird — My code's crashing when given pre-1970 dates.
Friend [pointing at Cueball and his computer]: Epoch fail!
It'll be less than that. 2038 is when it will completely hit the fan. However, anything that stores future datetimes could hit it earlier. 10 year product maintenance? You'll start storing out of range dates in just 4 years time.
I used to work on some insurance software that went haywire in 2018 when a 20 year policy was created. That wasn't a fun month for us.
Also, wtf, 2018 was 6 years ago!?
Which is why 64 bit time has been widely adopted and even made to work on 32 bit systems. 2038 is already a problem in some areas and nobody wants Y2K issues again, so people are getting it solved much earlier than last time.