[tz] zdump bug in Asia/Singapore
eggert at cs.ucla.edu
Sun Sep 7 00:43:54 UTC 2014
Arthur David Olson wrote:
> We may save some grief down the line by specifying in zdump.8 that cutoffs
> are starts of UT years (as distinct from starts of local time years).
Yes, I suppose you're right. Proposed patch attached.
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From fef27b6086b22784e44281bfb3ec712cf258af65 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert at cs.ucla.edu>
Date: Sat, 6 Sep 2014 17:42:00 -0700
Subject: [PROPOSED PATCH] * zdump.8, NEWS: Document zdump -c's treatment of
(Problem reported by Arthur David Olson.)
NEWS | 6 ++++++
zdump.8 | 9 ++++++---
2 files changed, 12 insertions(+), 3 deletions(-)
diff --git a/NEWS b/NEWS
index 6955f70..53ec202 100644
@@ -23,6 +23,12 @@ Unreleased, experimental changes
An access to uninitalized data has been fixed.
(Thanks to Jörg Richter for reporting the problem.)
+ Changes affecting documentation and commentary
+ zdump -c's treatment of years is now documented to use the
+ Gregorian calendar and Universal Time without leap seconds.
+ (Thanks to Arthur David Olson for reporting the problem.)
Release 2014g - 2014-08-28 12:31:23 -0700
diff --git a/zdump.8 b/zdump.8
index 94de021..7f0bc78 100644
@@ -45,14 +45,17 @@ This generates output that is easier to compare to that of
implementations with different time representations.
.BI "\*-c " [loyear,]hiyear
-Cut off verbose output near the start of the given year(s).
+Cut off verbose output at the start of the given year(s).
+Cutoff times are computed using the Gregorian calendar and Universal
+Time (UT) ignoring leap seconds.
-the program cuts off verbose output near the starts of the years
+the program cuts off verbose output at the starts of the years
\-500 and 2500.
.BI "\*-t " [lotime,]hitime
Cut off verbose output at the start of the given time(s),
-given in decimal seconds since 1970-01-01 00:00:00 UTC.
+given in decimal seconds since 1970-01-01 00:00:00
+Coordinated Universal Time (UTC).
Time discontinuities are found by sampling the results returned by localtime
at twelve-hour intervals.
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