Thanks for testing this Douglas.
With all of the same settings I have not yet personally created the issue on my own local site, but I am not doubting the existence of this bug. The related code is this line of code from Importer.php, inside the Facebook Importer add-on of ours:
$start_date = date_i18n( $this->date_format, strtotime( $fb_event->start_time ) );
That bit of code, $fb_event->start_time, is indeed where the discrepancy seems to be arising from.
I will create a bug ticket for our developers to investigate this more closely, though I’m afraid at this time there aren’t any other immediate courses of action I can recommend.
I’m sorry about this state of things. There are essentially two bugs now, both of which we have to work on bugfixes for and release those fixes in upcoming releases of the plugins. I do not have ETAs on these fixes, though Brian has already shared a code solution for the first bug and so that fix should be included in the very next release coming out. I hope the same for the second bug.
Thank you,
George