On 29 Jul 2019, at 19:47, Johan Vromans &lt;jvromans(a)squirrel.nl&gt; wrote: Hi, I have a repeating entry that repeats every 30 days. It is some kind of todo so when I took action I change the subject of the event by adding a 'checked' mark. This leads to an event (ics) that has several VEVENTs. One is the 'main': it describes the event and the RRULE. The others are modified occurrences with RECURRENCE-IDs. See attachment 'previous.ics'. Today I needed to move all upcoming events one day back. So I selected 'change all occurrences', 'repeat', and adjusted the date. The result can be found in attachment 'current.ics'. However, no future events are shown anymore. One thing I noticed: in previous.ics all RECURRENCE-IDs reflect the past dates and match DTSTART/DTEND. RECURRENCE-ID;VALUE=DATE:20190102 RECURRENCE-ID;VALUE=DATE:20190201 RECURRENCE-ID;VALUE=DATE:20190303 RECURRENCE-ID;VALUE=DATE:20190402 RECURRENCE-ID;VALUE=DATE:20190502 RECURRENCE-ID;VALUE=DATE:20190601 RECURRENCE-ID;VALUE=DATE:20190701 But in the new event they became future dates and no longer match DTSTART/DTEND: RECURRENCE-ID;VALUE=DATE:20190730 RECURRENCE-ID;VALUE=DATE:20190829 RECURRENCE-ID;VALUE=DATE:20190928 RECURRENCE-ID;VALUE=DATE:20191027 RECURRENCE-ID;VALUE=DATE:20191126 RECURRENCE-ID;VALUE=DATE:20191226 RECURRENCE-ID;VALUE=DATE:20200125 Did I do anything wrong? -- Johan <previous.ics><current.ics>