Q: WHAT YEAR WAS SARAH BORN?
A: IT DEPENDS WHAT CALENDAR YOU ARE USING!
On the Gregorian calendar (the one you might have on your wall) the year was 2023 BC.
On the Hebrew calendar, sometimes called the biblical calendar, the year was 2024 AM.
Genesis 17:17 New King James Version (NKJV)
17 Then Abraham fell on his face and laughed, and said in his heart, “Shall a child be born to a man who is one hundred years old? And shall Sarah, who is ninety years old, bear a child?”