LinuxDay.AT 2020 - some time around October-December 2020 (No CfP yet)
Hack4Glarus 2020.2 - some time in late November/early December 2020? (No CfP yet)
IT-Kongress 2020, Neu-Ulm, Germany - probably the 1st or 2nd Thursday in November 2020 (No CfP yet)
X2Go: The Gathering 2020, Linuxhotel, Essen, Germany - some time in Q3 or Q4 2020
OpenPOWER Summit Europe 2020, ??? - some time around September-October 2020 (No CfP yet)
Linux Expo Ulm 2020, Ulm, Germany - if it takes place at all
TUEBIX 2020, Tübingen, Germany - some time around June - July 2020 (No CfP yet)
Hack4Glarus 2020.1 - 2020-06-05 - 2020-06-07 (No CfP yet)
LinuxWochen Wien, Vienna, Austria - 2020-05-07 to 2020-05-09 (No CfP yet)
Linux-Info-Tag Augsburg, Augsburg, Germany - 2020-04-25 - Volunteers: Stefan, Mihai (No CfP yet, to be expected soon - according to https://www.luga.de/)
Chemnitzer LinuxTage, Chemnitz, Germany - 14-03-2020 to 15-03-2020 - unable to attend, clashes with Pi and More 12 1/2
Pi and More 12 1/2, Stuttgart, Germany - 14-03-2020 - Booth only; Volunteers: Stefan, Uli, with Mihai as optional stand-in (CfP sent; deadline 2020-02-08, reply expected by 2020-02-18 - https://piandmore.de/de/conference/pam12-5/call/)
2019
Past Events
2019-11-29 to 2019-12-01 - Hack4Glarus 2019 Winter, Linthal, Switzerland
We'll have an X2Go demo booth there, to check out how well X2Go works on a Multi-Gigabit-per-second network with IPv6