Costume-Con: CC40 NEW! Costume-Con 40 was held in Bethesda, Maryland, from April 1 to 4, 2022, and had the theme "Rogues, Royals, and Renegades." Future Fashion Show Single Pattern Competition Costume-Con 40 Fantasy and Science Fiction Masquerade Costume-Con 40 Historical Masquerade Costume-Con 40 Committee