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Published 20 hours ago • verified publisher icon rianjs

Incorrect timezone calculation if short recurrence falls into an ambiguous local time

Open minichma opened this issue 9 months ago • 0 comments

Describe the bug In case of a DST change it can happen that the end time of an occurrence is after the start time in UTC but before in local time. In this case incorrectly an exception is raised.

To Reproduce

Enumerate the following VEVENT

DTSTART;TZID=Europe/Vienna:20201025T023000
DURATION:PT45M

The expected outcome would be 20201025T023000/PT45M but actually an exception is raised:

System.ArgumentException : End time (10/25/2020 02:15:00 +02:00 Europe/Vienna) must be greater than start time (10/25/2020 02:30:00 +02:00 Europe/Vienna). (Parameter 'end')

Environment (please complete the following information):

  • ical.net version: 5.0.0-pre.41

minichma avatar Feb 23 '25 15:02 minichma