First of all having a Label that displays a date is not such a good idea (unless it is actually bound to a DateTime Object). If that is the case you should really use your DateTime Object in a PARAMETERIZED QUERY!!!
Parameterized queries keep your calls to the database clean and safe (no SQL injection!) :)
The code should look something like this:
DateTime dt = DateTime.Today;
String query = "select name from vacseat where dt = @dt";
DbCommand cmd = new DbCommand(query, connectionObject);
cmd.Parameters.AddWithValue("@dt", dt);
This should do the trick :)
For more info on Command Object see
this MSDN page[
^].
Good luck! :)