Every year, the MARC participates in ARRL Field Day. Field Day is the most popular on-the-air event held annually in the US and Canada. On the fourth weekend of June, more than 40,000 radio amateurs set up temporary transmitting stations in public places to demonstrate ham radio’s science, skill and service to our communities and our nation. It combines public service, emergency preparedness, community outreach, and technical skills all in a single event.