Robert Downey Jr. and Timothée Chalamet joke about turning December 18 into 'Dunesday' with dual blockbusters

Los Angeles, Jan 15 (UNI) Hollywood may have found its next tongue-in-cheek cinematic event, when Robert Downey Jr. and Timothée Chalamet have playfully proposed turning December 18 into a pop-culture phenomenon, as "Avengers: Doomsday" and "Dune: Part Three" prepare to open in cinemas on the same day. The actors appeared on stage together in LA on Wednesday for a special screening of Chalamet's A24 movie Marty Supreme. Downey Jr. told the audience: "We both have films opening on December 18, and we decided to coin it … We're thinking Dunesday.'" The moniker got a laugh in the room, with Downey…