Afaik, a subscribed external read-only calendar resource is not updated instantly but by a background cron job as described here. I have in mind that the resource will be updated not more than once a week after it has successfully been loaded.
Afaik, a subscribed external read-only calendar resource is not updated instantly but by a background cron job as described here. I have in mind that the resource will be updated not more than once a week after it has successfully been loaded.