I'm on the fence with the date thing in this case, given that to get something like "09/30" you'd have to use Format(), in which case it will turn it into a string anyway. If the posted info is the only use for these dates I'm not sure it matters. You wouldn't be able to use DatePart on valid dates either, unless you'd be OK with single characters for month and day values less than 10.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.