We have the fortunate situation that Sustain Summit will be on January 30 in Brussels, tow days before FOSDEM.
If you are staying for FOSDEM, then maybe you are also interested in CHAOSScon, which we host on January 31.
The CHAOSScon CFP is open until November 30.
From the CHAOSScon Website:
Learn about open source project health metrics and tools used by open source projects, communities, and engineering teams to track and analyze their community work. This conference will provide a venue for discussing open source project health, CHAOSS updates, use cases, and hands-on workshops for developers, community managers, project managers, and anyone interested in measuring open source project health. We will also share insights from the CHAOSS working groups on Diversity and Inclusion, * Evolution,* Risk, Value, and Common Metrics.
I look forward to seeing all of you in Brussels.
Disclaimer: I’m on the CHAOSScon organizing committee.