diff options
Diffstat (limited to 'newtzset.3')
| -rw-r--r-- | newtzset.3 | 29 |
1 files changed, 6 insertions, 23 deletions
diff --git a/newtzset.3 b/newtzset.3 index 028cfd2563e3..77e76c9d6974 100644 --- a/newtzset.3 +++ b/newtzset.3 @@ -277,7 +277,7 @@ is a placeholder. .TP .B <\-03>3<\-02>,M3.5.0/\-2,M10.5.0/\-1 stands for time in western Greenland, 3 hours behind UT, where clocks -follow the EU rules of +follow the EU rule of springing forward on March's last Sunday at 01:00 UT (\-02:00 local time, i.e., 22:00 the previous day) and falling back on October's last Sunday at 01:00 UT (\-01:00 local time, i.e., 23:00 the previous day). @@ -290,28 +290,13 @@ If .I TZ specifies daylight saving time but does not specify a .IR rule , -and the optional -.BR tzfile (5)-format -file -.B posixrules -is present in the system time conversion information directory, the -rules in -.B posixrules -are used, with the -.B posixrules -standard and daylight saving time offsets from UT -replaced by those specified by the -.I offset -values in -.IR TZ . -However, the -.B posixrules -file is obsolete: if it is present it is only for backward compatibility, -and it does not work reliably. +the rule typically defaults to the current US daylight-saving rule, +although such a default is not guaranteed and +is incorrect for many locations outside the US. Therefore, if a .I TZ string directly specifies a timezone with daylight saving time, -it should specify the daylight saving rules explicitly. +it should specify the daylight saving rule explicitly. .PP For compatibility with System V Release 3.1, a semicolon .RB ( ; ) @@ -403,13 +388,11 @@ for any of the errors specified for the routines and .BR read (2). .SH FILES -.ta \w'/usr/share/zoneinfo/posixrules\0\0'u +.ta \w'/usr/share/zoneinfo/GMT\0\0'u /etc/localtime local timezone file .br /usr/share/zoneinfo timezone directory .br -/usr/share/zoneinfo/posixrules default DST rules (obsolete) -.br /usr/share/zoneinfo/GMT for UTC leap seconds .PP If /usr/share/zoneinfo/GMT is absent, |