Celestrial orbs alignment
In a galaxy 2.7 million light years away from here, for approximately 6 minutes, planet D5TG32, planet Zorg (the astronomer who named that one was a fan of Marvel comics) and planet Yo1Y10z8 were perfectly aligned.
This phenomenon happens every 17,780,293,930,399,450 human years. Or thereabout.
At precisely the same moment, my three kids were seated at the same table, all doing their homework, with no bickering, not a sound.
But that's a lot rarer.