Q: WHAT YEAR DID CAINAN DIE?
A: IT DEPENDS WHAT CALENDAR YOU ARE USING!
On the Gregorian calendar (the one you might have on your wall) the year was 2811 BC.
On the Hebrew calendar, sometimes called the biblical calendar, the year was 1236 AM.
Genesis 5:14 - And all the days of Cainan were nine hundred and ten years: and he died.