-----Original Message----- From: Dave Hackenyos [SMTP:hackenyo@roguewave.com] Sent: Friday, April 16, 1999 8:12 PM To: ado@elsie.nci.nih.gov Subject: accessing DST rules at runtime Hello, I have been working on an implementation problem about which you may have some insight. I hope you don't mind a question or two. I am attempting to discover a way to query any (most) Operating Systems about what it may think the daylight rule is for the Timezone in which it thinks it is located. I wish to do this at runtime. I am aware that a call to tzset() will set a host of information, but only a few are available to the programmer (tzname, daylight, etc). I cannot find a way to get at the exact DST rule information even though the system is well aware of it during every call of localtime(). Your tar files at elsie.nci.nih.gov are full of info about the subject and several, if not all platforms of interest to me use it. Your localtime() function seems to know how to parse these binary zoneinfo files, but once again, I am unable to discern how to access the DST rule info for my own use. My question: Could you shed some light on how (given knowledge of the path to a particular OS's zoneinfo location) one could gleen the DST rule at runtime? I would be forever in your debt. Thanks for any help you could send my way, Dave Hackenyos hackenyo@roguewave.com (541)754-2976