On Monday, there will be a widespread strike in German public transport. Both long-distance travel (trains and flights) and many local transport services will be affected. Disruptions can be expected to start on the 26th and continue on to the 28th.
Comments and information on this subject can go into the comments of this post. To keep things manageable, additional posts will be removed.
https://www.dw.com/en/germanys-deutsche-bahn-cancels-all-long-distance-trains-on-monday/a-65097310
https://www.euronews.com/travel/2023/03/23/german-unions-call-for-widespread-transport-strike-on-monday
https://reiseauskunft.bahn.de/bin/query.exe/en – look up your DB connection here.
https://www.bahn.com/en/booking-information/passenger-rights – if you need a refund for a DB ticket.
https://www.berlin.de/en/news/8112587-5559700-large-scale-strike-transport-sector-mond.en.html – information about Belin – BER airport and the BVG won’t be striking.
If anyone has useful links to add, please comment.