Command-line and Emacs Calendar Client
1- [x] list/search events
2- [x] add/remove events
3- [x] edit events
4- [x] timezones
5- [x] diagnose events failing to parse [[https://github.com/robur-coop/icalendar/issues/14]]
6- [x] [[https://github.com/robur-coop/icalendar/pull/13][handle RECURRENCE-ID]]
7- [x] [[https://github.com/robur-coop/icalendar/issues/15][RRULE with local datetime]]
8- [x] server mode
9- [x] hold =Event='s in-memory instead of parsing them for every =Query=
10- [ ] add timezone all date functions
11- [ ] allow editing recurrence-ids
12- [ ] support specifying duration
13- [ ] CalDAV syncing
14- [ ] support complex datetime queries
15- [ ] custom date/time formatting
16- [ ] support querying text with regex
17- [ ] support VTIMEZONE
18- [ ] support VALARMS
19- [ ] support VOTODS
20- [ ] support VCARDS
21- [ ] support VJOURNAL
22- [ ] implement TUI front end with something like [[https://github.com/leostera/minttea][minttea]]
23- [ ] implement an emacs front end, like mu4e to mu
24 - [x] listing, searching, querying
25 - [x] show details
26 - [x] show file
27 - [x] refresh
28 - [x] list possible calendars
29 - [x] add functions and bindings to change query parameters on the fly
30 - [ ] timezone support
31 - [ ] support adding, deleting, and editing events
32 - [ ] add a org-agenda style view for caledonia-list