People give one another leis (yes, even at work) and everyone wears them all day long (no, as a matter of fact, they are not just something given out to tourists at the airport by cruise employees in floral shirts).
There are also contests for the most beautiful and elaborate lei-making. The following day, these exquisite lei are brought to the burial place of Hawaii's most revered alii (royalty from earlier times) and after a moving ceremony, they are placed on the tombs of these honored leaders.
And, of course, there is hula. Not the kind you can buy at the party store. Hula. With a capital H.
Enjoy. Happy Lei Day!