Found It!
only thing that comes to mind
if i had to guess, the Conjunction of Jupiter and Saturn bringing forth the Star of Christ may have been such event
https://en.wikipedia.org/wiki/Great_conjunction
A great conjunction is a conjunction of the planets Jupiter and Saturn, when the two planets appear closest together in the sky. Great conjunctions occur approximately every 20 years when Jupiter "overtakes" Saturn in its orbit. They are named "great" for being by far the rarest of the conjunctions between naked-eye planets[1] (i.e. excluding Uranus and Neptune).