I would really like to use CiviCRM's function to create an ical feed for the calendar. But I'm having some hard times to get it working.

The event has a title, a date, a custom category and a 'long description'. When you visit the url to the ical feed: https://example.tld/civicrm?page=CiviCRM&q=civicrm%2Fevent%2Fical&reset=1

you get the following .ics file


PRODID:-//CiviCRM//NONSGML CiviEvent iCal//EN
DESCRIPTION:Some description

But when I use the url of the feed in fastmail or google calendar for instance, an error appears, or the calendar items do not appear. What could be the problem?

I use CiviCRM 5.10.3 on Wordpress.

Kind regards,


--- edit ---

I got the following error message from Fastmail, my mailprovider.

Syncing to your [redacted] calendar has been disabled: [ad2278bd-7237-4dee-884f-4eff6f3666bc] The calendar data was invalid: Error parsing VCalendar data: error Closed a different card name than opened at line 7 char 0:

PRODID:-//CiviCRM//NONSGML CiviEvent iCal//EN
 <--- at /usr/lib/x86_64-linux-gnu/perl5/5.20/Text/VCardFast.pm line 55.

PRODID:-//CiviCRM//NONSGML CiviEvent iCal//EN
 at /home/mod_perl/hm/ME/CalDAVTalk.pm line 1427.
    ME::CalDAVTalk::_getEventsFromVCalendar(ME::CalDAV=HASH(0x8601578), "\x{feff}BEGIN:VCALENDAR\x{a}VERSION:2.0\x{a}PRODID:-//CiviCRM//NONSGML CiviE"...) called at /home/mod_perl/hm/ME/CalDAVTalk.pm line 2554
    ME::CalDAVTalk::vcalendarToEvents(ME::CalDAV=HASH(0x8601578), "\x{feff}BEGIN:VCALENDAR\x{a}VERSION:2.0\x{a}PRODID:-//CiviCRM//NONSGML CiviE"...) called at /home/mod_perl/hm/ME/CalDAV.pm line 1434
    eval {...} called at /home/mod_perl/hm/ME/CalDAV.pm line 1433
    ME::CalDAV::syncFromIcal(ME::CalDAV=HASH(0x8601578), "b8285308-2a18-4c47-9d22-fae8d8798d21", "\x{feff}BEGIN:VCALENDAR\x{a}VERSION:2.0\x{a}PRODID:-//CiviCRM//NONSGML CiviE"..., HASH(0x89e5670), "Force", 0, "ReadUidPrefix", "913888i-") called at /home/mod_perl/hm/ME/CalDAV.pm line 1904
    eval {...} called at /home/mod_perl/hm/ME/CalDAV.pm line 1867
    ME::CalDAV::syncCalendar(ME::CalDAV=HASH(0x8601578), 913888, "Force", 0) called at /home/mod_perl/hm/scripts/caldav_sync.pl line 271
    main::SyncCalendar(ME::User=HASH(0x89bea78)) called at /home/mod_perl/hm/scripts/caldav_sync.pl line 98

I have no idea what to make of this. There are currently no events in the calendar.

  • For google, it might just be a delay. For example if you import the file, as a file import not a feed, you need to then close google calendar and reopen it to see the event. The feed maybe takes its own time. See here where it says "add using a link" support.google.com/calendar/answer/…. It says it might take 12 hours. When you say you get an error, what error do you get? – Demerit Mar 27 '19 at 15:57
  • i don't seem to get an error no more. but also after several days the calendar items are not loading. am i missing something obvious? what do you make of the ical-feed and its url, they're alright, right? – Sam Simons Mar 28 '19 at 16:28
  • It looks ok, and it does import into google as a file. A crazy workaround might be to set up the feed on your phone or somewhere where it does work, then set up that calendar to sync to the google calendar. – Demerit Mar 28 '19 at 16:37
  • I just got the error from Fastmail. Do you have an idea what to make of it? – Sam Simons Apr 8 '19 at 11:29
  • I got a response from Fastmail. The engineers there found out that the problem is the following: "The problem is that your ics file begins with a UTF-8 Byte order mark or BOM — en.wikipedia.org/wiki/Byte_order_mark Our server did not know what to do with this, but we've fixed it and now you should be all set. I don't think it's typical to provide these in ics files, but we should have been able to handle it just the same." So this seems to be an issue of CiviCRM, I opened an issue on their Gitlab: lab.civicrm.org/dev/wordpress/issues/25 . – Sam Simons May 2 '19 at 17:50

As discussed in https://lab.civicrm.org/dev/wordpress/issues/25 and using a different grep since the grep linked to in the comments above doesn't seem to work, there were two theme files with a BOM.

This grep

find . -type f -printf "%p " -a -exec od -x -N 4 \{\} \; | grep "bbef 3cbf"


wp-content/themes/ari/functions.php wp-content/themes/ari/header.php


The issue has been solved with help I got on the civiCRM repo. (https://lab.civicrm.org/dev/wordpress/issues/25).

  1. First I found two files in my site that are loaded on every page that contain a BOM.

find . -type f -printf "%p " -a -exec od -x -N 4 \{\} \; | grep "bbef 3cbf"

  1. Secondly I removed those BOMs with vim.

Edit the files (which in my case where the functions.php and header.php file of my theme) with vim. Type :set nobomb and save the files.

Now I can use the ical url of my site and it will load in virtual calendars.

  • Ha ha you might not have noticed I'm the same person, the same way you have different usernames. No worries. – Demerit May 31 '19 at 23:11
  • Haha, thanks for your help! – Sam Simons Jun 2 '19 at 13:40

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