Following the release of GM version a few days ago, Catalina 10.15 was released Monday October 7th, 2019.
Build is 19A583. It is available off the AppStore for download. Those who run on beta versions through the beta enrolment program should probably 1st revert to default mode before attempting to download as the new macOS version may not be otherwise be offered.
Our 1st few guides have just stared to roll in so we invite everyone to bring in their new contributions.