The file format is described with these fields: .I tzh_ttisgmtcnt The number of UTC/local indicators stored in the file. .I tzh_ttisgmtcnt UTC/local indicators, each stored as a one-byte value; they tell whether the transition times associated with local time types were specified as UTC or local time, and are used when a time zone file is used in handling POSIX-style time zone environment variables. A number of variables in localtime.c, tzfile.h, and zic.c dealing with these fields have variations of this "isgmt" substring. This presents a naming conflict because technically GMT and UTC are two different things. I find the inconsistent naming creeping into functions which deal with the file format. I would like to prevent variations of the string "GMT" from winding up in API names since the definition of the field refers to UTC. I propose wholesale replacing of the "isgmt" substring in tzcode files with "isutc" so that the file format fields are named consistently with their definition. If absolutely necessary, a #define can be used in tzfile.h so that code referencing tzh_ttisgmtcnt will still compile. -Andrew