[ale] Linux calendar server

[Alex Carver]

Any suggestions for a lightweight calendar server for Linux?  I stumbled
across Radicale as an option though input and opinions on it or anything
else are very welcome.  This is entirely personal, I just want to keep
my Thunderbird calendar (Lightning) and my phone synced without
necessarily involving Google itself.  Nothing fancy needed, it just
needs to be able to keep a calendar or two that a handful of client
software can access.