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* bug#56125: 28.1; Timezone conversion sometimes wrong for recurring events, when importing ical to diary
@ 2022-06-21 14:21 Martin Apel via Bug reports for GNU Emacs, the Swiss army knife of text editors
  2022-06-21 18:57 ` Lars Ingebrigtsen
  0 siblings, 1 reply; 8+ messages in thread
From: Martin Apel via Bug reports for GNU Emacs, the Swiss army knife of text editors @ 2022-06-21 14:21 UTC (permalink / raw)
  To: 56125

[-- Attachment #1: Type: text/plain, Size: 11227 bytes --]

When importing the attached minimal ical file using icalendar-import-file, the resulting time is off by one hour. The problem probably lies somewhere in icalendar--convert-recurring-to-diary, but I couldn't pinpoint the exact location.
The only meeting in the attached icalendar file is defined in timezone 'America/New_York' at 10 am. It shows up in my diary (which is timezone 'Europe/Berlin') at 3pm, even though the time difference between the two timezones is 6 hours.

To reproduce, save the attached file somewhere and execute the following command:

(icalendar-import-file "~/calendar_issue.ical" "~/test.diary")

after adjusting the paths as necessary.


In GNU Emacs 28.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.24, cairo version 1.16.0)
 of 2022-04-05 built on LP5-MAL1-CEM
Repository revision: 5a223c7f2ef4c31abbd46367b6ea83cd19d30aa7
Repository branch: HEAD
Windowing system distributor 'HC-Consult', version 11.0.12009000
System Description: Debian GNU/Linux 11 (bullseye)

Configured using:
 'configure --program-suffix=-28 --with-x-toolkit=gtk3 --with-json --with-native-compilation --with-xwidgets CC=gcc-10
 PKG_CONFIG_PATH=/opt/rh/devtoolset-8/root/usr/lib64/pkgconfig'

Configured features:
CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ JPEG JSON LIBOTF LIBSELINUX LIBXML2 MODULES NATIVE_COMP
NOTIFY INOTIFY PDUMPER PNG SECCOMP SOUND THREADS TIFF TOOLKIT_SCROLL_BARS X11 XDBE XIM XPM XWIDGETS GTK3 ZLIB

Important settings:
  value of $LANG: en_US.UTF8
  locale-coding-system: utf-8-unix

Major mode: Diary

Minor modes in effect:
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Load-path shadows:
/home/martin/.emacs.d/el-get/transient/lisp/transient hides /usr/local/share/emacs/28.1/lisp/transient
/home/martin/.emacs.d/el-get/gdb-mi/gdb-mi hides /usr/local/share/emacs/28.1/lisp/progmodes/gdb-mi

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Memory information:
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[-- Attachment #2.1.1: Type: text/plain, Size: 0 bytes --]



[-- Attachment #2.1.2: Type: text/html, Size: 571 bytes --]

[-- Attachment #2.2: calendar_issue.ical --]
[-- Type: application/octet-stream, Size: 1311 bytes --]

BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//davmail.sf.net/NONSGML DavMail Calendar V1.1//EN
METHOD:PUBLISH
BEGIN:VTIMEZONE
TZID:America/New_York
BEGIN:STANDARD
DTSTART:16010101T020000
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=1SU;BYMONTH=11
END:STANDARD
BEGIN:DAYLIGHT
DTSTART:16010101T020000
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=2SU;BYMONTH=3
END:DAYLIGHT
END:VTIMEZONE
BEGIN:VEVENT
ORGANIZER;CN="Someone":MAILTO:Someone@somewhere.com
DESCRIPTION;LANGUAGE=en-US:Dummy
RRULE:FREQ=WEEKLY;INTERVAL=2;BYDAY=TH;WKST=MO
UID:040000008200E00074C5B7101A82E0080000000000C2199FEA2ED80100000000000000001
 0000000A5B64C1A3F56FA46BE19A6956606D137
SUMMARY;LANGUAGE=en-US:Dummy
DTSTART;TZID="America/New_York":20220317T100000
DTEND;TZID="America/New_York":20220317T103000
CLASS:PUBLIC
PRIORITY:5
DTSTAMP:20220303T153703Z
TRANSP:OPAQUE
STATUS:CONFIRMED
SEQUENCE:0
X-MICROSOFT-CDO-APPT-SEQUENCE:0
X-MICROSOFT-CDO-OWNERAPPTID:-1616693274
X-MICROSOFT-CDO-BUSYSTATUS:BUSY
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X-MICROSOFT-DONOTFORWARDMEETING:FALSE
X-MICROSOFT-DISALLOW-COUNTER:FALSE
LAST-MODIFIED:20220525T120006Z
END:VEVENT
END:VCALENDAR

^ permalink raw reply	[flat|nested] 8+ messages in thread
end of thread, other threads:[~2022-06-23 11:55 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2022-06-21 14:21 bug#56125: 28.1; Timezone conversion sometimes wrong for recurring events, when importing ical to diary Martin Apel via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-06-21 18:57 ` Lars Ingebrigtsen
2022-06-21 22:10   ` Phil Sainty
2022-06-22  6:10   ` Martin Apel via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-06-23  8:48     ` Lars Ingebrigtsen
2022-06-23 10:06       ` Martin Apel via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-06-23 11:39         ` Lars Ingebrigtsen
2022-06-23 11:55           ` Martin Apel via Bug reports for GNU Emacs, the Swiss army knife of text editors

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