On what days during the month does Oracle apply patch updates to fix bugs, apply code optimizations, and add new features?

Oracle applies patch updates on the first and third Fridays of each month. This schedule is structured to ensure that updates to the TEST environment occur on the first Friday. This provides users the necessary time to test any changes in a controlled environment before they are applied to the production (PROD) environment on the third Friday.

This systematic approach allows for effective problem detection and resolution, minimizing the risk of disruptions in the production environment. The separate days allocated for updates in TEST and PROD environments also enable organizations to maintain operational stability while still benefiting from updates and enhancements. By using Fridays, Oracle likely minimizes the impact on user operations by scheduling updates at the end of the work week, allowing for any potential post-update adjustments to occur over the weekend.