Copyright (c) 1999, by Sun Microsystems, Inc.
All Rights Reserved.

#ident	"@(#)README	1.5	99/06/14 SMI"

The /usr/share/lib/zoneinfo/src directory contains zoneinfo timezone source
files.  These source files have been compiled using zic(1M) to create
the zoneinfo data files in /usr/share/lib/zoneinfo.  The zic command can be
used with the zoneinfo source files to create additional data files.

The zoneinfo files track the Olson public source provided at
ftp://elsie.nci.nih.gov/pub/, therefore zoneinfo files may be added
and removed as the Solaris source is updated.  Replace usage of GB-Eire
with GB.  Replace usage of the following GMT[+-]* files with the equivalent
Etc/GMT[-+]* file.  For example, replace GMT+1, which is 1 hour east of the
Prime Meridian, with Etc/GMT-1.  Note that /usr/share/lib/zoneinfo/Etc/GMT[-+]*
timezones are consistent with POSIX, where hours preceded by a "-" are east of
the Prime Meridian, and hours preceded by a "+" are west of the Prime Meridian.
The following files may be removed in a future Solaris release:

/usr/share/lib/zoneinfo/GB-Eire
/usr/share/lib/zoneinfo/GMT-12
/usr/share/lib/zoneinfo/GMT-11
/usr/share/lib/zoneinfo/GMT-10
/usr/share/lib/zoneinfo/GMT-9
/usr/share/lib/zoneinfo/GMT-8
/usr/share/lib/zoneinfo/GMT-7
/usr/share/lib/zoneinfo/GMT-6
/usr/share/lib/zoneinfo/GMT-5
/usr/share/lib/zoneinfo/GMT-4
/usr/share/lib/zoneinfo/GMT-3
/usr/share/lib/zoneinfo/GMT-2
/usr/share/lib/zoneinfo/GMT-1
/usr/share/lib/zoneinfo/GMT+1
/usr/share/lib/zoneinfo/GMT+2
/usr/share/lib/zoneinfo/GMT+3
/usr/share/lib/zoneinfo/GMT+4
/usr/share/lib/zoneinfo/GMT+5
/usr/share/lib/zoneinfo/GMT+6
/usr/share/lib/zoneinfo/GMT+7
/usr/share/lib/zoneinfo/GMT+8
/usr/share/lib/zoneinfo/GMT+9
/usr/share/lib/zoneinfo/GMT+10
/usr/share/lib/zoneinfo/GMT+11
/usr/share/lib/zoneinfo/GMT+12
/usr/share/lib/zoneinfo/GMT+13

As zoneinfo timezones are updated, the savings/daylight transition rules
and timezone name abbreviations may change.  This can affect how 
the times are calculated in the local timezone.  Therefore the interpretation
of a time_t value can vary amongst Solaris releases that use different
versions of the zoneinfo timezones.

The zoneinfo timezone data files do not transition past
Tue Jan 19 03:14:07 2038 GMT.  Therefore for 64-bit applications using
zoneinfo timezones, calculations beyond this date may not use the correct
offset from standard time, and could return incorrect values.  This affects
64-bit versions of interfaces such as ascftime(3C), cftime(3C), ctime(3C),
getdate(3C), ftime(3C), mktime(3C), and localtime(3C).

For more information see zic(1M), zdump(1M), environ(5), TIMEZONE(4),
ctime(3C), and mktime(3C) man pages.
