[tero]

As you guessed, roland35, I do track my calendar.txt in git.

One main benefit from git is also to work as an insurance against (user) errors, and make the whole process much more transparent. When I have used calendars with automatic synchronization, I would have enjoyed a "change log" to make sure that my timezones and meetings are not mistakenly modified by software.

For your dentist example, I would probably just use 'grep' or find in my text editor. After all, six months of days is very little text.