SimpleMobileTools
First occurrence of recurring event not shown
Here's a stripped down version of one of my CalDAV calendars (I removed timezones and irrelevant events):
BEGIN:VCALENDAR VERSION:2.0 PRODID:-//PYVOBJECT//NONSGML Version 1//EN X-WR-CALNAME;VALUE=TEXT:Ens. UFR BEGIN:VEVENT UID:2f57fd368cf7f408e154311e29d96b3170cec357 DTSTART;TZID=/freeassociation.sourceforge.net/Europe/Paris:20210921T131500 DTEND;TZID=/freeassociation.sourceforge.net/Europe/Paris:20210921T144500 CLASS:PUBLIC CREATED:20210614T144902Z DTSTAMP:20210612T200844Z EXDATE:20211116T121500Z LAST-MODIFIED:20210614T145030Z RRULE:FREQ=WEEKLY;COUNT=10;BYDAY=TU SEQUENCE:3 SUMMARY:Outils num. TRANSP:OPAQUE END:VEVENT BEGIN:VEVENT UID:2f57fd368cf7f408e154311e29d96b3170cec357 RECURRENCE-ID;TZID=/freeassociation.sourceforge.net/Europe/Paris:20210921T1 31500 DTSTART;TZID=/freeassociation.sourceforge.net/Europe/Paris:20210921T131500 DTEND;TZID=/freeassociation.sourceforge.net/Europe/Paris:20210921T144500 CLASS:PUBLIC CREATED:20210614T144902Z DTSTAMP:20210612T200844Z LAST-MODIFIED:20210614T144936Z SEQUENCE:3 SUMMARY:Outils num. TRANSP:OPAQUE END:VEVENT END:VCALENDAR
The first occurrence of the event (21/9/2021) doesn't show up in SCP v.6.15.0. It does show up in Google Agenda.
The line with "31500" indeed starts with a single space (looks like the editor here removed it; the "insert code" button doen't work for me).