By default the theme runs a WordPress cron every 3 hours to synchronise the calendar availability based on the ical feeds imported into each property.
If you wish to edit the default value (3 hours) you can use the below directions.
Install WP Crontrol plugin
Edit ICAL CRON
The cron job that checks for new feed data is in events.php in function setup_event_wp_estate_sync_ical.