I just had this issue too.
Open ajax-event-calendar.php and find line 371
It currently reads
$timezone = get_option('timezone_string');
Change it to
$timezone = wp_timezone();
The issue seems to be bad handling of timezones. In my case in GMT its deducting 1hr from midnight, so all events are getting added as if its 11pm the day before, so everything is off by 1hr.
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This reply was modified 6 years, 4 months ago by domster83.
I’ve done some checking, its not a plugin, it appears to be the theme we are using. Its called Inspired but its only tested up to WP3.5.
Issue could be related to its shortcake implementation: https://ww.wp.xz.cn/support/topic/inspired-theme-not-working-with-update-381?replies=1
I seem to be having the same issue – visible on http://www.boningale-greensky.co.uk/gallery/
Wordpress 4.1.1
FJG version 3.3.5
