Regex for Valid Date

///

/// Checks the valid date.
///

/// The user.
public static bool CheckValidDate(DateTime date)
{
DateTime dt;
bool isValid = DateTime.TryParse(date.ToString(), out dt);

if (!isValid || dt.Year < 1753 || dt.Year > 9999)
{
return false;
}
else
{
return true;
}
}