Do I have to enter US within certain date to keep my US visa valid? Like the Canadian Landing Paper? % H1 |; V; G9 o. D # ?. J: a) N0 g, x0 N) l2 kI did not see that on the visa. Or maybe I missed it. 6 r% J9 P' a$ l0 U7 X2 @5 F+ h1 g" e8 M3 b' z6 S/ Q* W