I had actually forgotten until someone mentioned it at work today. We don't make a big deal out of it (I don't), I might get a card or something my son makes at school. We'll probably go for a family bicycle ride if the weather is nice.
But I feel for you. Its hard watching the fledglings take flight. My little guy won't kiss me goodbye at school anymore.
Maybe get a nice bottle of grog for hubby & yourself & relax in the sun? Order something tasty in.
Second thoughts can generally be amended with judicious action; injudicious actions can seldom be recovered with second thoughts.
--Cyteen by C.J.Cherryh