Two Lucene Hackdays in October '18

Hi all, we're running two free Lucene Hackdays in London on October 9th and Montreal on October 15th (the week of the Activate conference run by Lucidworks, in the expectation that various committers will be in town). Do come if you can - although I'm running them via our London Lucene/Solr Meetup group, we also do a lot of Elasticsearch projects and it would be great to see you! and have the details. We also need ideas on what to work on!