Fix for Facebook Event API "bug" that forces all events to use PAC time. http://tri.be/support/forums/topic/maybe-usefull-code-for-timezones-fix/ * Make sure you remove this once you're using any version of Tribe's Facebook Events greater than version 1.0.4

tribe_patch_convert_to_timezone.php

<?php

// fix for http://tri.be/support/forums/topic/maybe-usefull-code-for-timezones-fix/
// remove this once you're using any version of Tribe's Facebook Events greater than version 1.0.4

add_filter( 'tribe_fb_parse_facebook_event', 'tribe_patch_facebook_timezone');
function tribe_patch_facebook_timezone( $event_params ){

  // build date string
	$start_date = $event_params['EventStartDate'] . ' ' . str_pad($event_params['EventStartHour'], 2, '0', STR_PAD_LEFT) . ':' . str_pad($event_params['EventStartMinute'], 2, '0', STR_PAD_LEFT) . ' ' . $event_params['EventStartMeridian'];
	$end_date = $event_params['EventEndDate'] . ' ' . str_pad($event_params['EventEndHour'], 2, '0', STR_PAD_LEFT) . ':' . str_pad($event_params['EventEndMinute'], 2, '0', STR_PAD_LEFT) . ' ' . $event_params['EventEndMeridian'];

	$timezone = 'America/Los_Angeles';
	tribe_patch_convert_to_timezone( $start_date, $timezone );
	tribe_patch_convert_to_timezone( $end_date, $timezone );

	// set the dates
	$event_params['EventStartDate'] = TribeDateUtils::dateOnly( $start_date );
	$event_params['EventEndDate'] = TribeDateUtils::dateOnly( $end_date );

	if ( empty($event_params['EventAllDay']) ) {
		$event_params['EventStartHour'] = TribeDateUtils::hourOnly( $start_date );
		$event_params['EventStartMinute'] = TribeDateUtils::minutesOnly( $start_date );
		$event_params['EventStartMeridian'] = TribeDateUtils::meridianOnly( $start_date );
		$event_params['EventEndHour'] = TribeDateUtils::hourOnly( $end_date );
		$event_params['EventEndMinute'] = TribeDateUtils::minutesOnly( $end_date );
		$event_params['EventEndMeridian'] = TribeDateUtils::meridianOnly( $end_date );
	}

	return $event_params;
}

function tribe_patch_convert_to_timezone( &$datetime, $timezone = 'GMT', $return_format = 'c' ){
	$gmt_offset = get_option( 'gmt_offset' );
	$datetime_obj = new DateTime( $datetime, new DateTimeZone( $timezone ) );
	$datetime_obj->setTimezone(new DateTimeZone('GMT'));
	$datetime_obj->modify( $gmt_offset . ' hours' );
	$datetime = $datetime_obj->format( $return_format );
}