Advisor getting married, should grad students chip in for gift? Our advisor is getting married over winter break.  None of us are super close to him and the wedding is going to be a very private event that none of us are invited to.

Should all of us (his graduate students) chip in for a wedding gift for him?  

What is the etiquette for this?
I laughed here; can't imagine my supervisor getting married.  It is just nice to see the supervisor involving in life..  

For the question, Why not? It is a big day for your supervisor. Just make sure the gift come from group of students not only one student. If you missed the first day after his return (assuming he's going on vacation for marriage), then no need for a gift. Either ways, a verbal congratulations is a must here :)