APS Virtual Meeting - 2020
One of the first major Physics Conference to go virtual, discussing broad range of topics spanning astrophysics, particle physics, nuclear physics, and gravitation. Contrary to the previous meetings, the organizers took the much appreciated move to make the registration free and open to everyone. This made the registration to jump by about four-folds. During the 4-day conference, it handled 175 live sessions, running up to 15 in parallel. The online repository of the meeting content is worth giving a look.