Yes it's all day.
I like your idea, and as others have mentioned Animation academy is daily and approximately every 30 minutes... I bet you would have a rough time going to it regularly for any period of time, I base this on the fact that almost every class will be a beginner introduction which for me would make it very hard to pay attention after a few rounds of that. Either way, good luck.
Open daily and about 15 min long. Something new about every half hour to an hour. Don't take this as an "art class". Perhaps taking classes at a local community college would be ideal.
The animation academy is open everyday and they have classes all day long. You do have to have a ticket for California Adventure though.
While Disney is obviously in the business of hiring animators and developing them, I don't think they are in the business of teaching them in an academic sense.
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