Does some PDO::PARAM_??? exist which can be used for dates or timestamps?

Sample code:

$sql = "UPDATE my_table SET current_date = :date WHERE id = 43";
$statement = $pdo->prepare ($sql);
$statement->bindValue (":date", strtotime (date ("Y-m-d H:i:s")), PDO::PARAM_STR);
$statement->execute ();
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