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.