Why no celebrating for adopted children?

A new baby is celebrated.
A promotion is celebrated.
A house upgrade is celebrated.
But when a child joins the family through adoption. Nothing.
Why?
Makes me sad. Adopted kids should be celebrated also.

I agree!

That is actually true !

I agree too! They have the random event where the people have an adoption party, but no celebrating every time and a child is adopted.

I also agree! I'm glad they at least have the 'adoption day' event sometimes.