Amazon Aurora PostgreSQL: PostgreSQL 18 end of standard support

RDS Extended Support allows a database to keep running this major version after 28 Feb 2031, for an additional cost.

• Aurora automatically enrolls a DB instance after that date if RDS Extended Support was enabled at creation or restoration.
• It provides security updates for critical and high CVEs, bug fixes for critical issues, and support cases.
• Charges apply only to certain minor versions. The release calendar lists the eligible minor versions for each major version.
• Enrollment can be changed at any time, at the cluster level. Disabling it after that date upgrades the instance or cluster automatically to the next supported major version.

1. Test the upgrade first by following Testing an upgrade of your production DB cluster to a new major version, so that you know your applications can run on the new version.
2. Manually upgrade the Aurora PostgreSQL DB cluster to the new major version. See Performing a major version upgrade.
3. Run the upgrade during the cluster's maintenance window or when operations are minimal, because a brief outage is possible.
4. If an immediate switchover matters most, run the old and new clusters side by side with Amazon Aurora Blue/Green Deployments.