AMS Special Session on The Many Voices of Mathematical Communication Organized by Samuel Hansen
AMS Mathematical Op-Ed Workshop run by The RW Jones Agency
AMS Special Session on A Showcase of Recreational Mathematics: Theory, Applications, and Engagement in Teaching and Research organized by Timothy Goldberg
AMS DC-Based Policy and Communications Opportunities Organized by Karen Saxe and the AMS Office of Government Relations
JPBM public communications award lecture : "Practical tips for becoming a public-facing mathematician" by Noah Giansiracusa
And, many (but not all) of our events are under the AMS special sessions "communicating mathematics I, II and III" (link here)
(Please let us know if you would like your event added to this list!)