King Kamehameha I Day Friday 6/10

My Hawaiian calendar says that this Friday is King Kam (I) day.

Any ideas how the appropriate way to celebrate this day? Do we dress is red and yellow?

Perhaps a gathering of some kind is in order.

What about the Hala Kahiki's King Kamehameha Rum-&-Cocoa-based Chocolate Shakes? Does anyone have a recipe?