About Therby™
Therby is the Thursday before the Derby.
Some people spell it "Thurby", because that is the way it is referenced by the Kentucky Derby. However, we think it is better spelled "Therby" so that the word incorporates even more of the derby...
Thurby contains only three letters from "Derby".
Therby contains four letters from "Derby".
Therefore, Therby has more of the derby in its soul.