Q: WHAT YEAR WAS SERUG BORN?
A: IT DEPENDS WHAT CALENDAR YOU ARE USING!
On the Gregorian calendar (the one you might have on your wall) the year was 2222 BC.
On the Hebrew calendar, sometimes called the biblical calendar, the year was 1825 AM.
Genesis 11:20 - And Reu lived two and thirty years, and begat Serug