Hallo Zach,
I'm not sure, but I think you have to set the eval of the corresponding field
to date or datetime in the TCA array.
example
"mydate" => Array (
"exclude" => 0,
"label" => "Date"
"config" => Array (
"type" => "input",
"size" => "10",
"max" => "10",
"eval" => "date"
)
)
Ursula