Calendar event same start and enddate wrong (Google Calendar)

[RobertM]

I have some events in my Google calendar with the same start and end date, example: 13:30 to 13:00 15.11.2022

The calendar is configured with showEnd: true, timeFormat: “dateheaders”. This 0 minutes events are displayed from the calendar module: 13:30 - 23:59 or 13:30 - 00:59.

Any idea?

[sdetweil]

@RobertM yes, there is a 1 second subtraction to keep from rolling over into the next time slot… midnight is 00:00 TOMORROW, 23:59:59 is today…

[RobertM]

Sorry, i make a mistake: The events have the same start and end time, example: 13:30 to 13:30 15.11.2022 - so a event with 0 minutes.

[sdetweil]

@RobertM download the ics file

at the command prompt ctrl-alt-t

curl -sL xxxx > somefile.ics
xxxx is the url in the mm cal config

find that entry in the ics file (it’s just text)

and let me see

BEGIN:VEVENT
....
END:VEVENT

[RobertM]

@sdetweil here is the requested section:

BEGIN:VEVENT
DTSTART:20221121T123000Z
DTSTAMP:20221120T074630Z
UID:4anfmr8fbcgce4qsi1675tpgcq@google.com
CREATED:20221120T074454Z
LAST-MODIFIED:20221120T074454Z
LOCATION:
SEQUENCE:0
STATUS:CONFIRMED
SUMMARY:XYZ-Robert (21.11.2022 13:30-13:30 MEZ)
TRANSP:OPAQUE
END:VEVENT

[sdetweil]

@RobertM it has no DTEND or DURATION … so the module sets End to match Start

from the spec
https://icalendar.org/iCalendar-RFC-5545/3-6-1-event-component.html

For cases where a “VEVENT” calendar component specifies a “DTSTART” property with a DATE value type but no “DTEND” nor “DURATION” property, the event’s duration is taken to be one day.

For cases where a “VEVENT” calendar component specifies a “DTSTART” property with a DATE-TIME value type but no “DTEND” property, the event ends on the same calendar date and time of day specified by the “DTSTART” property.

this second is the case for the event you provided

[RobertM]

@sdetweil Ok, that’s true for a single event.

If I modify the event to a series event. Then the calendar module shows a wrong end date.

In the ical file, the content is different.

BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20221121T133000
DTEND;TZID=Europe/Berlin:20221121T133000
RRULE:FREQ=WEEKLY;BYDAY=MO
DTSTAMP:20221120T133538Z
UID:4anfmr8fbcgce4qsi1675tpgcq@google.com
CREATED:20221120T074454Z
DESCRIPTION:
LAST-MODIFIED:20221120T133406Z
LOCATION:
SEQUENCE:1
STATUS:CONFIRMED
SUMMARY:XYZ-series
TRANSP:OPAQUE
END:VEVENT

I indented the lines to read the values better

 DTSTART;TZID=Europe/Berlin:20221121T133000
   DTEND;TZID=Europe/Berlin:20221121T133000

[sdetweil]

@RobertM great, thanks…

so, I’ve found it, I don’t know why this is there or side effects…

but

edit the ~/MagicMirror/modules/default/calendar/calendarutils.js

find line 430-ish ( i added debug so the numbers may be off

						endDate = moment(parseInt(startDate.format("x")) + duration, "x");
						if (startDate.format("x") === endDate.format("x")) {
							endDate = endDate.endOf("day");
						}

add the // to the endDate = line, so it looks like this

						endDate = moment(parseInt(startDate.format("x")) + duration, "x");
						if (startDate.format("x") === endDate.format("x")) {
							//endDate = endDate.endOf("day");
						}

[RobertM]

@sdetweil yes, thats works - after restarting node - many thanks!

Would it also be possible to only show the start of such 0 minutes events?

[sdetweil]

@RobertM i don’t think so… u asked to showEnd:true…

there is no conditional logic there

my settings and result

			config: {
				showEnd:true,
				timeFormat:"absolute",
				urgency:0,
				getRelative:0,