TimeZone problems

[mclwill]

The full calendar is displaying events with a delay of 11 hours from the time recorded for the event in Civi - clearly it is thinking the times are UTC. However when I download a calendar of events from Civi - ie an ical.ics all of the timezone information for the events is correct (ie. set for GMT + 11 hours for Melbourne Australia). Not sure what has to be done to get full_calendar displaying in the correct timezone

[agileware-justin]

@mclwill that is interesting, especially since when we last worked on the Events Calendar it was for a customer in Melbourne, Australia.

Is your calendar URL public? Would be good to check it out. If not, that's OK. I would do a basic check of making sure that WordPress is timezone is set to Melbourne/Australia and not GMT+11.

[mclwill]

WP timezone is set to Melbourne/Australia.

I have just made the URL public for you to have a look : https://zoedaniel.com.au/civicrm-events-calendar/

[agileware-justin]

Thanks @mclwill that does look a bit odd. I don't have an immediate answer, we will need to review and see what may be causing that issue. Might take a week or two to get back to this one.

[mclwill]

Thanks for taking a look. I will need to make that URL private again.

If you could let me know I will make public again when you are checking.

[mclwill]

I've done some trial and error changes - this plugin seems to fix the problem. https://wordpress.org/plugins/use-clients-time-zone/

But would be good to know why it is needed. Thanks again for your help.

[mclwill]

I've had to remove that plugin at it causes some other WP event plugins to display the wrong time zone.

So back to square one.

Any help would be appreciated.

[mclwill]

I think I have located the problem I am having:

The code in rest/json-all-events.php is not formatting the start and end time of events in line with the FullCalendar requirements. Timezone offsets need to have a colon between hour and minutes (see https://fullcalendar.io/docs/timeZone) in line with ISO8601.

But for some strange reason PHP function date_format needs parameter DATE_ATOM (and not DATE_ISO8601) to achieve the correct format for ISO8601 - see https://www.php.net/manual/en/class.datetimeinterface.php#datetimeinterface.constants.types

Need to change this in four places of get_all_events in rest/json-all-events.php and also do an extra call to wp_timezone() in else statement of get wordpress timezone

when I change the date formatting as per the following I am getting the correct resuls :

'start' => (new DateTimeImmutable($event['start_date'], $tz))->format(DateTime::ATOM),