Hello.

In case if you are having some issue of not ability to import new events, then check this troubleshooting instruction: https://wpbookingcalendar.com/faq/ics-importing-issue/

Please read more about this feature here: https://wpbookingcalendar.com/faq/#sync

Import.
Please check about the configuration of import events from .ics feeds in this FAQ instruction here https://wpbookingcalendar.com/faq/import-ics-feeds/
Please note, the import process is working in that case, when some visitor is open your website page with booking import shortcode. So you can configure CRON at your server, for periodically access this page with booking import shortcode to start import process. Or you can insert the import shortcode before booking form shortcode, so firstly system will start import process and only then show booking form, when someone visit your page.

You can define CRON at your server for periodically access pages with import .ics feeds shortcodes and start import process during specific time-intervals, then check this: https://wpbookingcalendar.com/faq/cron-script/

Export.
Please check about the configuration of export .ics feeds in this FAQ instruction here https://wpbookingcalendar.com/faq/export-ics-feeds/
Booking Calendar is generate .ics feed with bookings in real time. But how often some service (like airbnb, or booking.com ) access this .ics feed to import the bookings from Booking Calendar into own system, does not depend from Booking Calendar. So in other words, Booking Calendar does not force to generate import process by third party service, when some booking is created. You need to check with support of this service (like airbnb or booking.com), about how often they can access the .ics feed tor making import.

Hello.
Unfortunately, it is not possible in the Booking Calendar version to set some time slots as unavailable for the each days.
Even more, if we will set specific times in calendar days as unavailable (for example from 6pm to 8am), then you can not make selection of such days for making FULL day bookings. It's only possible to make selection of the time slot in these days for making bookings for available times.

So if you do not use the time slot in the booking form, you just need to write some text info (simple text) in the booking form or at the page that the working time ended at 6pm and starting at the 8am.
Kind Regards.

Hello.
Please open this file ../wp-content/plugins/{Booking Calendar Folder}/core/timeline/v2/wpbc-class-timeline_v2.php

( you can check how to edit files in WordPress menu in this article https://wpbookingcalendar.com/faq/how-edit-file-in-wp-menu/ )

then find this code:

if ( strlen( $bk_a_title__text ) > 20 ) { $bk_a_title__text = substr( $bk_a_title__text, 0, 20 ) . '...'; }

and replace it to this code:

if ( strlen( $bk_a_title__text ) > 120 ) { $bk_a_title__text = substr( $bk_a_title__text, 0, 120 ) . '...'; }