Read Luke 2:36-40.
Luke 2:36-40 And there was one Anna, a prophetess, the daughter of Phanuel, of the tribe of Aser: she was of a great age, and had lived with an husband seven years from her virginity; (37) And she was a widow of about fourscore and four years, which departed not from the temple, but served God with fastings and prayers night and day. (38) And she coming in that instant gave thanks likewise unto the Lord, and spake of him to all them that looked for redemption in Jerusalem. (39) And when they had performed all things according to the law of the Lord, they returned into Galilee, to their own city Nazareth. (40) And the child grew, and waxed strong in spirit, filled with wisdom: and the grace of God was upon him.
Simeon and Anna recognized who the LORD Jesus Christ was when His human form was only eight days old. They even began proclaim Him and His arrival to others. How is it people did not seem to pay attention to Him and understand Who He was?