Some tz comments refer to US/Eastern, but it is present only if the `backward' file is used. Here is a proposed patch. =================================================================== RCS file: RCS/Theory,v retrieving revision 1995.3 retrieving revision 1995.3.1.1 diff -c -r1995.3 -r1995.3.1.1 *** Theory 1993/11/22 20:23:18 1995.3 --- Theory 1995/10/30 01:50:47 1995.3.1.1 *************** *** 47,53 **** abbreviations are used. It was recognized that allowing the "TZ" environment variable to ! take on values such as "US/Eastern" might cause "old" programs (that expect "TZ" to have a certain form) to operate incorrectly; consideration was given to using some other environment variable (for example, "TIMEZONE") to hold the string used to generate the --- 47,53 ---- abbreviations are used. It was recognized that allowing the "TZ" environment variable to ! take on values such as "America/New_York" might cause "old" programs (that expect "TZ" to have a certain form) to operate incorrectly; consideration was given to using some other environment variable (for example, "TIMEZONE") to hold the string used to generate the =================================================================== RCS file: RCS/date.c,v retrieving revision 1995.3.1.1 retrieving revision 1995.3.1.2 diff -c -r1995.3.1.1 -r1995.3.1.2 *** date.c 1995/10/30 00:43:48 1995.3.1.1 --- date.c 1995/10/30 01:50:47 1995.3.1.2 *************** *** 207,215 **** if ((cp = strchr(value, '.')) != NULL) { /* ** Ensure that the failure of ! ** TZ=US/Eastern date 8712312359.60 ** doesn't get misdiagnosed. (It was ! ** TZ=US/Eastern date 8712311859.60 ** when the leap second was inserted.) ** The normal check won't work since ** the given time is valid in GMT. --- 207,215 ---- if ((cp = strchr(value, '.')) != NULL) { /* ** Ensure that the failure of ! ** TZ=America/New_York date 8712312359.60 ** doesn't get misdiagnosed. (It was ! ** TZ=America/New_York date 8712311859.60 ** when the leap second was inserted.) ** The normal check won't work since ** the given time is valid in GMT. =================================================================== RCS file: RCS/zic.8,v retrieving revision 1995.3 retrieving revision 1995.3.1.1 diff -c -r1995.3 -r1995.3.1.1 *** zic.8 1995/03/11 17:55:51 1995.3 --- zic.8 1995/10/30 01:50:47 1995.3.1.1 *************** *** 324,336 **** .nf .ti +.5i .if t .ta \w'Link\0\0'u +\w'LINK-FROM\0\0'u ! .if n .ta \w'Link\0\0'u +\w'US/Eastern\0\0'u Link LINK-FROM LINK-TO .sp For example: .sp .ti +.5i ! Link US/Eastern EST5EDT .sp .fi The --- 324,336 ---- .nf .ti +.5i .if t .ta \w'Link\0\0'u +\w'LINK-FROM\0\0'u ! .if n .ta \w'Link\0\0'u +\w'America/New_York\0\0'u Link LINK-FROM LINK-TO .sp For example: .sp .ti +.5i ! Link America/New_York US/Eastern .sp .fi The