Michael said to Gabriel "You know the Old Man's tetchy, have you got your **** together? Have you got your choir ready?"
Gabriel said, "Just **** out, have you got that star in place? I don't see it in the sky yet, have you booked the allotted space?
"By the time the magi notice and start their journey west the party will be over, so I think it would be best if you tell Him they'll come later, that the vibe will work far better if we go ahead with the shepherds and then have the kings come later."
Mickey was a little miffed, but he knew that Gabe was right. He'd been distracted with the detail to ensure the star was bright.
So Mickey went and told the Boss, "It really makes more sense, cos once Jesus is a toddler he'll enjoy the frankincense."
Angels have a lot on their plates. Readers of the New Testament estimate that the 3 wise men came to Bethlehem a couple of years after the shepherds. This is based on King Herod ordering that all children under 2 be slaughtered which he based on when the star first appeared.