Another Bloomsday with no public celebration.

My fifth year in Idaho where people don't
celebrate Bloomsday. I am spending the
summer in Boise but all my books are still in
Moscow, so I went to a bookstore in downtown
Boise to buy a (fourth) copy of Ulysses. I asked
the manager and owner if there were any
Bloomsday events being held next week and
he said:

What's Bloomsday?