>>You know, that solution is not going to work for me. A zip code just evaluated to a date of 10/01/03 and the EMPTY() would not catch that. Numerics are going to be a problem. I do not know the type of cValue, so how can I make sure I only convert valid dates to dates?
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>You can use an UDF.

That's great, but I'm still left with the issue of being able to tell if a number is not a date if it satisfies the !EMPTY() of the value. If the number converts to a seemingly good date, then I'm out of luck. I have to know whether it is a date beforehand. I think I have to work this from another angle.