Hi Jacob,
Clever formula! No, I don’t think there’s anything more you could do to change the way the dates display. I’m surprised (and pleased) that the graph axis correctly interpreted “date spelled out” as a date and surprised (and disappointed) that it didn’t do so when you explicitly typed the attribute as date.
I’ll record a request that CODAP include more formatting options for dates and that the “hover” text respect those options.
Thanks for the feedback!
Bill