Re: [tz] Beginner's help request

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 calculators.) 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? Regards, Daniel