Adding a topic here as a place to discuss the work @floris is doing to organise a community event around DrupalCon Amsterdam 2019 and potentially having a contributors workshop or sprint at/around the event. We may also be able to have some involvement on the Acquia booth and to advertise the community event with a flier.
This is now happening at www.contributionday.org so I’ll mark this as done. Thanks @floris for all your hard work on getting this up and running!