Read the statement by Michael Teeuw here.
[ERROR] Moment Timezone has no data for Customized Time Zone
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@sdetweil
Hi Sam, I use a special agenda from office 365 for the calender module
Here is the information. Maybe I can change something in this agenda instead of the special code as work around?BEGIN:VEVENT UID: .... SUMMARY:Verpakkingen DTSTART;TZID=Customized Time Zone:20210107T080000 DTEND;TZID=Customized Time Zone:20210107T090000 CLASS:PUBLIC PRIORITY:5 DTSTAMP:20211030T090840Z TRANSP:OPAQUE STATUS:CONFIRMED SEQUENCE:0 LOCATION: X-MICROSOFT-CDO-APPT-SEQUENCE:0 X-MICROSOFT-CDO-BUSYSTATUS:BUSY X-MICROSOFT-CDO-INTENDEDSTATUS:BUSY X-MICROSOFT-CDO-ALLDAYEVENT:FALSE X-MICROSOFT-CDO-IMPORTANCE:1 X-MICROSOFT-CDO-INSTTYPE:0 X-MICROSOFT-DONOTFORWARDMEETING:FALSE X-MICROSOFT-DISALLOW-COUNTER:FALSE END:VEVENTThanks in advance
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@klassieker
Current timezone in the agenda.
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@klassieker ok, its just noise, doesn’t hurt anything…
BUT if u want to test getting rid of the message do this
edit ~/MagicMirror/modules/default/calendar/calendarutils.js
if (event.start.tz.includes(" ")) { // this is line 37 , not changed let tz = null // first replacement line // if the tz is the MS customized TZ if(event.start.tz ==='Customized Time Zone') // use the locally set tz tz=moment.tz.guess() else // use the lookup table to get the IANA name as moment and date don't know MS timezones tz = CalendarUtils.getIanaTZFromMS(event.start.tz); // last replacement line Log.debug("corrected TZ=" + tz); // line not to be changedreplace the lines BETWEEN line 37 and the last line (also not changed)
with first replacement line thru last replacement line
so it looks like that - 
@sdetweil
Hi Sam,
I changed the rows and it works, no more noise.
But what if the module is updated bu the developer?
Thank you very much, - 
@klassieker you were testing… I will submit a change request … next release is January 1.
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@sdetweil Thanks, I will close this topic as solved
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