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tgeimer

I fixed my issue. Some searching led me to this:
https://github.com/MichMich/MagicMirror/issues/791#issuecomment-289306407
No dates before 1970 are accepted - but in my birthday calendar I have created birthdays e.g. in 1946…
Thank you @amcolash

This is how you can check if this is why your calendar is not working:
ssh to your pi

cd /home/pi/MagicMirror
DIAPLAY=:0 npm start dev

If you see this in the output, you have dates in your calendar before 1970:

Whoops! There was an uncaught exception...
Error: dates lower than Thu Jan 01 1970 00:00:00 GMT+0100 (CET) are not supported
    at Object.toOrdinal (/home/pi/MagicMirror/node_modules/rrule-alt/lib/rrule.js:105:15) 
    at Iterinfo.rebuild (/home/pi/MagicMirror/node_modules/rrule-alt/lib/rrule.js:1409:35)
    at RRule._iter (/home/pi/MagicMirror/node_modules/rrule-alt/lib/rrule.js:978:10)
    at RRule.between (/home/pi/MagicMirror/node_modules/rrule-alt/lib/rrule.js:794:21)
    at /home/pi/MagicMirror/modules/default/calendar/calendarfetcher.js:122:24
    at Request._callback (/home/pi/MagicMirror/modules/default/calendar/vendor/ical.js/node-ical.js:11:5)
    at Request.self.callback (/home/pi/MagicMirror/node_modules/request/request.js:188:22)
    at emitTwo (events.js:106:13)
    at Request.emit (events.js:191:7)
    at Request. (/home/pi/MagicMirror/node_modules/request/request.js:1171:10)
MagicMirror will not quit, but it might be a good idea to check why this happened. Maybe no internet connection?
If you think this really is an issue, please open an issue on GitHub: https://github.com/MichMich/MagicMirror/issues

What I did to fix my birthday calendar: Edit this file

/home/pi/MagicMirror/node_modules/rrule-alt/lib/rrule.js

Go to line 56 or search for the first occurance of “ORDINAL_BASE” and change this line:

ORDINAL_BASE: new Date(1970, 0, 1),

set it to a lower year like 1900.
Then restart your magic mirror (pm2 restart mm)

And it’s (hopefully) GREAT AGAIN :-D :clap:

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