Usually, the PostgreSQL Community releases minor patches on the Thursday of the second week of the second month of each quarter. This can vary depending on the nature of the fixes. For example, if the fixes include critical fixes as a postgres community response to security vulnerabilities or bugs that might affect data integrity. The [&]

https://www.percona.com/blog/2019/05/13/postgresql-minor-versions-released-may-9-2019/