MMM-Calendar always shows 23:59 if showEndTime: True

[SwissChemist]

Dear Sam,
I have exactly done what is written in your instructions.
The start date is shown correctly, but there are two issues left:

1. with ‘showEnd: True’ I can see 23:59 for recurring events (not whole day) on my calendar. (With non recurring events, the end time is correct!)
2. some dates for recurring events (whole day) are wrong.

I have prepared an ics-file and a screenshot of my MagicMirror Monitor for comparison.

The following dates are wrong:
3-weekly whole day - 22.Okt should be: 21.Okt
Weekly whole day - 26.Okt should be: 27.Okt
2-weekly whole day - 27.Okt should be: 28.Okt
Monthly whole day - 1.Nov should be 2.Nov
Weekly whole day - 2.Nov should be 3.Nov
Weekly whole day - 9.Nov should be 10.Nov
2-weekly whole day - 10.Nov should be 11.Nov
…
I have defined a test calendar, ich which all weeklys are planned for the same day, all 2-weeklys are planned for the same day, all 3-weeklys are planned for the same day. So you can easily see if these dates differ, there is a mistake…
Files and a MagicMirror picture are attached.

Thanks very much for your support!

[0_1601321084756_myCalendar](Uploading 100%)

[sdetweil]

@SwissChemist please see my cat message…

i assume you are gmt+ something…

there is a newly found bug in the repeating rule parser, which I am working on. but it might be a while…

if the normal time of the event is not exceeded by your tz offset then the event date is (in gmt) the prior day.
then the rule calculates, and gets the current day, and the jams the prior to midnight time onto the event, now it is 24 hours later…

at the time the calculation and adjustment is done, the rule processor doesn’t know the original effect of the timezone offset

[SwissChemist]

You are right, now in summer, we are GMT+1, in winter it’s GMT+2…

[sdetweil]

@SwissChemist

no the one I am fighting from Australia

meeting at 09/28/20, 08:30
utc is 09/27/20, 22:30

rule detemines today is valid DATE
takes todays date 09/28, with yesterdays time 22:30
oops…

[sdetweil]

@sdetweil so, your 1st entry is confusing… label is
SUMMARY:Monthly 17-18
but the cal entry says
DTSTART;TZID=Europe/Zurich:20201002T170000, Oct 02, 1700 local, 1500 utz

[sdetweil]

also, showEnd is a pain… technically the clock is day:00:00 to day 23:59 as 23:59+1 is 24:00/00:00 which is the next day

so, what do you think we should be showing there…

[sdetweil]

@SwissChemist want to try a fix for me…

edited: changed added line

edit the ~/MagicMirror/modules/default/calendar/calendarfetcher.js
find this (approx line 240) and add the one line listed below

						// Loop through the set of date entries to see which recurrences should be added to our event list.
						for (let d in dates) {
							const date = dates[d];
							// ical.js started returning recurrences and exdates as ISOStrings without time information.
							// .toISOString().substring(0,10) is the method they use to calculate keys, so we'll do the same
							// (see https://github.com/peterbraden/ical.js/pull/84 )
							const dateKey = date.toISOString().substring(0, 10);
							let curEvent = event;
							let showRecurrence = true;
							let duration = 0;

							startDate = moment(date);
							duration = parseInt(moment(curEvent.end).format("x")) - parseInt(moment(curEvent.start).format("x")) // --- add this line

in your timezone (mine is Sep 28, 17:15)

[SwissChemist]

Hello Sam,
thanks very much for your great support.
Good news is that the endTime issue is solved now!

Nevertheless with recurring whole day events, the following entries are not correct yet:

3-weekly 13-14 is completely missing (should be 1.Okt)

Starting with the 3-weekly whole day 22.Okt (should be 21.Okt), every following ‘whole day meeting’ is shown one day too late.
You can easily see that even on your picture, as e.g. the 3-weekly whole day and the 3-weekly 13-14 should always take place at the same date.

Even on your picture this is not the case… monthly whole day is shown in 3 days, monthly 17-18 is shown in 4 days.

Once more, thanks for your great support so far!

[sdetweil]

yeh, that whole day thing… the spec says its whole day in the timezone where the computer is.
but the ical converter still adjusts it to UTC. (all parsed events are in UTC)

3-weekly 13-14 is completely missing (should be 1.Okt)
can’t be cause u asked for WEdnesdays

BEGIN:VEVENT
CREATED:20200928T173050Z
DTEND;VALUE=DATE:20201002
DTSTAMP:20200928T182733Z
DTSTART;VALUE=DATE:20201001
LAST-MODIFIED:20200928T182732Z
RRULE:FREQ=WEEKLY;INTERVAL=3;BYDAY=WE  < ----
SEQUENCE:0
SUMMARY:3-weekly whole day
UID:E2C82F47-1E0F-4FD0-93C4-746B2D53488B
URL;VALUE=URI:
END:VEVENT

so , this repeating event might start on Oct 1, but thats a thursday, so will not be shown

but later, Starting with the 3-weekly whole day 22.Okt (should be 21.Okt),
starts on 21+1 days from today 00:00:00 Oct 21, and ends on Oct 22

this is a fix in the ical parser… so, it will take time to get out…

[sdetweil]

can we try another quick fix?

in calendar.js

				// Define second, minute, hour, and day variables
				var oneSecond = 1000; // 1,000 milliseconds
				var oneMinute = oneSecond * 60;
				var oneHour = oneMinute * 60;
				var oneDay = oneHour * 24;
				if (event.fullDayEvent) {
					//subtract one second so that fullDayEvents end at 23:59:59, and not at 0:00:00 one the next day
					//event.endDate -= oneSecond;   < ---- comment out this one line