Advanced calendar event repeat rules

[charlag]

As a user i want to be able to define more advanced repeat rules so that i can be more flexible with defining repeating events.

Acceptance critera

• Allow configure rules for a certain day (e.g. BYMONTHDAY=22, BYDAY, )
• Exception for repeating events (EXDATE)

Implementation hint

We should support BY* repeat rules for the calendar events like BYMONTH/BYDAY etc to enable things like "every second Tuesday each month".

see https://tools.ietf.org/html/rfc5545#section-3.3.10

examples are:

BEGIN:VCALENDAR
PRODID:-//company//calendar app//EN
VERSION:2.0
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:byruletes
X-WR-TIMEZONE:Europe/Berlin
BEGIN:VEVENT
DTSTART;VALUE=DATE:20200622
DTEND;VALUE=DATE:20200623
RRULE:FREQ=MONTHLY;BYMONTHDAY=22
DTSTAMP:20200624T071758Z
UID:XXX0
CREATED:20200622T083746Z
DESCRIPTION:
LAST-MODIFIED:20200622T083746Z
LOCATION:
SEQUENCE:0
STATUS:CONFIRMED
SUMMARY:on 22nd monthly
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20200622
DTEND;VALUE=DATE:20200623
RRULE:FREQ=MONTHLY;BYDAY=4MO
DTSTAMP:20200624T071758Z
UID:XXX2
CREATED:20200622T083804Z
DESCRIPTION:
LAST-MODIFIED:20200622T083814Z
LOCATION:
SEQUENCE:0
STATUS:CONFIRMED
SUMMARY:fourth monday
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20200624
DTEND;VALUE=DATE:20200625
RRULE:FREQ=WEEKLY;WKST=MO;BYDAY=MO,WE
DTSTAMP:20200624T071758Z
UID:XXX2
CREATED:20200624T071724Z
DESCRIPTION:
LAST-MODIFIED:20200624T071724Z
LOCATION:
SEQUENCE:0
STATUS:CONFIRMED
SUMMARY:monday and wednesday
TRANSP:TRANSPARENT
END:VEVENT
END:VCALENDAR

event which starts on 22nd each month
event which happens every 4th Monday and Wednesday
event which happens every Monday and Wednesday

[joshuaobrien]

I am really interested in having this feature. I am happy to dedicate some time each day to working on this, if you are interested in additional hands!

[charlag]

@joshuaobrien that's nice to hear!
You could start with an algorithm, you cannot really change database type but you could prototype it.
See the spec I linked and CalendarModel

[vaf-hub]

We should also allow to modify single events that are part of a series, such as changing the description only for one event and not for the other occurrences.

[BiancaMass]

We should also allow to modify single events that are part of a series, such as changing the description only for one event and not for the other occurrences.

On that: would be great to have the possibility to delete or change the date for a single even of a series i.e. giving the options of "edit this event only" or "edit all events of the series" when making changes to a particular event.

[jacamporaGIS]

We should also allow to modify single events that are part of a series, such as changing the description only for one event and not for the other occurrences.

On that: would be great to have the possibility to delete or change the date for a single even of a series i.e. giving the options of "edit this event only" or "edit all events of the series" when making changes to a particular event.

yes this is really important

[jacamporaGIS]

I would also like to be able to easily copy events to other days. lets say i work the same shift 3 nights a week, I could just copy it from monday to wednesday

[SjoerdV]

Just adding some search terms to this issue as 'repeating' might be missed by some:
advanced recurring event
advanced recurring schedule
complex recurrence pattern