rm old and add open house timing

content/join/meetings.md

@@ -18,19 +18,18 @@ involved but don't know where to start.
 The next large CodeRefinery workshop is coming up in September, so we dedicate our meetings to the preparation and planning of it.
 If you have any questions or suggestions about the workshop or want to teach with us, please join for any of the upcoming sessions: 
 
-- 2024-12-02 Open team call
-- 2024-12-09 Open team call
 - 2024-12-16 CodeRefinery ambassador call
 - Break until 2024-01-06
 
 
 ## Open house events
 
 We invite everyone interested in CodeRefinery and CodeRefinery adjacent topics to join us for ~monthly open house events. 
-These half-day sessions are intended for discussion and co-working. Topics will be announced here: 
+These half-day sessions (usually 9-12 CET, if not indicated otherwise) are intended for discussion and co-working. You don't have to join the full session but can drop by whenever it suits you. 
+Topics will be announced here: 
 
-- 2024-12-17 Workshop format for reproducible research topics (CodeRefinery workshop week 2) 
-- 2025-01-14 Lesson development towards intermediate/advanced Git ("Git masterclass")
+- 2024-12-17 Workshop format for reproducible research topics (CodeRefinery workshop week 2) ; exceptionally 10 - 13 CET 
+- 2025-01-14 Lesson development towards intermediate/advanced Git ("Git masterclass") 
 - 2025-02-11 New instructor onboarding and lesson material development
 - ...