How do you get these $5 memberships for Tuesday's theaters and can you use them at any time on a Tuesday?

Its offered by Tmobile Tuesdays reward app and also being an AMC Stubs Rewards member. Just sign up and you will get the benefits. Once you join go to your dashboard https://www.amctheatres.com/showtimes/all/2018-10-08/amc-aventura-24/all?rel=tickettuesday_offer_dashboard_hero

Yes it works all day on Tuesdays the movies come out to be $7.20 or something close to that they charge you over a $1 on fees