We are pleased to announce the host and location of Boulder, Colorado, USA. It will be held 13-18 June 2021 so please reserve these dates. Congratulations to the local organizing committee, Kurt Maute (conference chair), James Guest, Julian Norato, Alireza Doostan and John Evans. The website can be found at https://www.wcsmo14.org, and the more detailed information will be posted in due course.