5:07 PM
In the category of "You learn something every day, even if other folks might have known it for years":

Wandering through a display of clocks in the museum yesterday, I saw a pair of nocturnals--not sundials or even moondials, but stardials. Pretty neat. I'll have to see if I can either lay my hands on one or make one, and then learn how to use it (or, maybe, the other way around.)