[tz] Beginner's help request

Daniel Ford dfnojunk at gmail.com
Thu Oct 19 00:08:52 UTC 2017

Thanks guys - you've all been extremely helpful, and I appreciate it.  I've
been trying to conceive an algorithm for finding the 'current' rules for a
locale, based on its 'reference city', and you've helped clarify what that
will involve, though I'm not there yet.

Thanks also for the pointer to Africa/Casablanca as one of the known
'4-transitions' localities.  And I liked the timeanddate visualisation,
Matt.  (Timeanddate has long been my 'goto' site for world time info and

So now I've opened the 'africa' file and searched for Africa/Casablanca, but
I only see *two* rules for 2017.  So how does the TZdb indicate that there
are *four* transitions this year?


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