Date verification with multiple values on Green Screen

I need to allow the users to enter any of the following values as a valid
date type on a display file:

010108 // Six digit date

20080101 // eight digit ISO date type

01012008 // eight digit USA date type

01/01/2008 // ten digit USA date type

I thought I could check the length of the field coming in, so if anything
is other than 6,8, or 10 it is automatically an invalid date...that part
is easy......

I wanted to check for a valid date value with the TEST(DE) but it seems
that will not work either since even though 010108 is tested as

TEST(DE) *MDY DateField;

It generates an error...which I am assuming is because the field is a 10a
and not a 6,0.

So I would need to check and make sure that it is also numeric for the 6
and 8 digit entries correct?

I know, it sounds crazy, but that is what I have been instructed to
do......


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