I've finally gotten around to doing some analysis on actual zoneinfo information files; and I've determined empirically that tzh_is***cnt are either zero or tzh_typecnt as Guy Harris recently said. But I've also found lots of files, not just poxisrules, in which the UTC/local and/or standard/wall indicators exist and are non-zero; so I'm still confused. Do I simply ignore them in all files except poxisrules (as Harris seemed to imply, but I might have misread it), or do I need to reinterpret the transition times based on these indicators when they exist? (If the latter, that seems to be the less desirable design. Since the files are used much more often than they're created, wouldn't it be reasonable to compute the wall clock times eagerly rather than lazily? Note also that, while creating the files, we have enough information to do that correctly. At the time the file is read, we've lost the DST offset amount and have only a switch indicating /whether/ we're observing DST.) Thanks, --Bill Seymour