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Subject: bug#78085: 30.1; wrong iCalendar export with diary-float
Resent-From: "Timo E." <tengel@HIDDEN>
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Hi,

the iCalendar export seems wrong when the .org file contains events 
with diary-float.
I reported this already to emacs-orgmode@HIDDEN, but it is not an 
issue in Org mode but in 'icalendar--convert-float-to-ical'.

For example, my .org file contains:
* my appointment
%%(diary-float t 6 1) 1st Sat/month

The agenda M-x org-agenda-list shows this event correctly at the first 
Saturday per month.
The .ics file created with M-x org-export-dispatch, c (Export to 
iCalendar), f (Current file) contains the event

BEGIN:VEVENT
UID:DS1-ddf9e720-3c8a-4b2a-93d8-62dde9cdf5a8
DTSTART;VALUE=DATE:20250418
EXDATE;VALUE=DATE:20250418
RRULE:FREQ=MONTHLY;BYDAY=1SA
SUMMARY:1st Sat/month
END:VEVENT

DSTART and EXDATE are set to the current date. (i.e. the date when the 
.ics file is created). I think DSTART should be set to the next first 
Saturday of the month. EXDATE is not required, as there are no 
exceptions specified.

RFC 5545 says in 3.8.5.3. Recurrence Rule
"The "DTSTART" property value SHOULD be synchronized with the 
recurrence rule, if specified. The recurrence set generated with a 
"DTSTART" property value not synchronized with the recurrence rule is 
undefined."

Thanks
Timo

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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: "Timo E." <tengel@HIDDEN>
Subject: bug#78085: Acknowledgement (30.1; wrong iCalendar export with
 diary-float)
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Date: Sun, 27 Apr 2025 09:32:03 +0000

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Message sent to bug-gnu-emacs@HIDDEN:

Subject: bug#78085: 30.1; wrong iCalendar export with diary-float
Resent-From: Eli Zaretskii <eliz@HIDDEN>
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Resent-Date: Sat, 10 May 2025 09:43:02 +0000
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To: "Timo E." <tengel@HIDDEN>, Richard Lawrence <rwl@HIDDEN>
Cc: 78085 <at> debbugs.gnu.org
Date: Sat, 10 May 2025 12:42:40 +0300
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> Date: Sun, 27 Apr 2025 11:05:20 +0200
> From:  "Timo E." via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@HIDDEN>
> 
> Hi,
> 
> the iCalendar export seems wrong when the .org file contains events 
> with diary-float.
> I reported this already to emacs-orgmode@HIDDEN, but it is not an 
> issue in Org mode but in 'icalendar--convert-float-to-ical'.
> 
> For example, my .org file contains:
> * my appointment
> %%(diary-float t 6 1) 1st Sat/month
> 
> The agenda M-x org-agenda-list shows this event correctly at the first 
> Saturday per month.
> The .ics file created with M-x org-export-dispatch, c (Export to 
> iCalendar), f (Current file) contains the event
> 
> BEGIN:VEVENT
> UID:DS1-ddf9e720-3c8a-4b2a-93d8-62dde9cdf5a8
> DTSTART;VALUE=DATE:20250418
> EXDATE;VALUE=DATE:20250418
> RRULE:FREQ=MONTHLY;BYDAY=1SA
> SUMMARY:1st Sat/month
> END:VEVENT
> 
> DSTART and EXDATE are set to the current date. (i.e. the date when the 
> .ics file is created). I think DSTART should be set to the next first 
> Saturday of the month. EXDATE is not required, as there are no 
> exceptions specified.
> 
> RFC 5545 says in 3.8.5.3. Recurrence Rule
> "The "DTSTART" property value SHOULD be synchronized with the 
> recurrence rule, if specified. The recurrence set generated with a 
> "DTSTART" property value not synchronized with the recurrence rule is 
> undefined."

Thank you for your report.

Richard, any comments or suggestions about this?

Last modified: Sat, 10 May 2025 09:45:01 UTC

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