# Research and Engineering Studio support policy Research and Engineering Studio (RES) supports multiple releases concurrently. RES uses a `YYYY.mm.patch` version scheme, where `YYYY.mm` represents a major release. `YYYY` represents the year, `mm` represents the month of release and `patch` indicates an incremental release. Each RES release has a scheduled End of Support Life (EOSL) date that is the last day of the `mm` month in year `YYYY`\+1. For example, the EOSL date for 2025.09 is September 30, 2026. After the EOSL date, no further support or maintenance is provided for that release. New features, performance improvements, security updates, and bug fixes are included in new major version releases (`YYYY.mm`). For critical issues, AWS provides fixes through patch releases, but only for releases that have not reached EOSL. In-place updates are supported only between patch releases within the same major release (for example, from 2024.04.01 to 2024.04.02). To use updates from a new major RES version, you need to perform a new installation of that version. To ensure you have access to the latest features and security updates, we recommend keeping your RES installation up-to-date with the most recent release. If you're running a version approaching its end of supported life (EOSL) date, please plan to upgrade to a newer version to maintain support and access to the latest improvements. For detailed instructions on upgrading RES, please [refer to our documentation](update-the-product.md). If you have any questions or need assistance with upgrading, please contact AWS Support. | Research and Engineering Studio version | End of support (EOSL) date | | --- | --- | | 2023.11.x | 11/30/2024 | | 2024.01.x | 1/31/2025 | | 2024.04.x | 4/30/2025 | | 2024.06.x | 6/30/2025 | | 2024.08.x | 8/31/2025 | | 2024.10.x | 10/31/2025 | | 2024.12.x | 12/31/2025 | | 2025.03.x | 3/30/2026 | | 2025.06.x | 6/30/2026 | | 2025.09.x | 9/30/2026 | **Important** You are responsible for patching your infra / VDI hosts after deployment.