How did Abraham “see” Jesus’ day?

Question: What did Jesus mean when he told the Jews at John 8:56: ā€œAbraham your father rejoiced greatly at the prospect of seeing my day, and he saw it and rejoiced.ā€ How did Abraham see Jesusā€™ day? The Jews claimed that Abraham was their father. That is because they knew that Abraham was the genetic progenitor of the Israelites. (Although he himself was not a Jew [...]