The Feast of the Circumcision marks Jesus’ first rite of passage, this being from a baby to a child. This was also the time when he was given his name, which had been chosen for him.
Also, we can’t lose sight of the shepherds who were among the first to know of the birth. They let it be known that something wonderful had happened, and so probably everyone in the area had heard.
This was Jesus’ beginning, especially as far a Hebrew law was concerned.