These face-to-face meetings are probably the IETF meetings (https://www.ietf.org/how/meetings/ https://www.ietf.org/how/meetings/), which seem to be around 3 pe

These face-to-face meetings are probably the IETF meetings (https://www.ietf.org/how/meetings/ https://www.ietf.org/how/meetings/), which seem to be around 3 per year (https://www.ietf.org/how/meetings/past/ https://www.ietf.org/how/meetings/past/), plus a few extra quic-specific meetings (https://www.ietf.org/how/meetings/interim/ https://www.ietf.org/how/meetings/interim/).