the day they didn't want over

Joseph and Mary were in Jerusalem.  Jesus was too.  They were  there to celebrate the festival of Passover like they did every year.  This year, they didn't notice that Jesus stayed behind.  For 3 days they searched for 12 year old Jesus.  Mary's anxiety is evident when she asked her young son:  "“Son, why have you treated us like this? Your father and I have been anxiously searching for you.”
The answer Jesus gave can be found in Luke 2:49. 
I feel certain to say that Joseph and Mary didn't want an experience like that again.  His understanding of it was so profound that it defied logic.  Luke tells us that His parents did not understand.  Sometimes we don't either.  One thing we can know with confidence is that God understands the whole grand picture and sees things we can't know.  He superintends all the circumstances of our life for His glory.  Praise God!