June 2026 International Edition Release Schedule - Production Monthly Release - INTERNAL

NOTE ALL DATES PROVISIONAL AND SUBJECT TO CHANGE.

Critical Dates this Cycle:

May Day holiday (UK): 4 May 2025
Spring bank holiday (UK)/ Memorial Day (US): 25 May 2025

Date	Time	Responsibility	Deliverables

Date	Time	Responsibility	Deliverables
Apr 29, 2026	18.00	SI Content Release Lead	Authoring begins for June 2026 International release. Update root concept synonym to 20260601 Check for and request updates to validation to align with large scale changes to content development (e.g. axiom, GCI, concrete domains etc). Check for MRCM changes to be implemented for the release.
May 4, 2026			MAY DAY PUBLIC HOLIDAY
May 7, 2026	12:00	SI Devops Team	Setup new automated JIRA tickets to be generated from the parent International Release ticket, for all Mapping steps below (both internal and external)
May 7, 2026	12:00	SI Content Release Lead	No further batch loads or bulk updates. No further promotion for projects that have large scale changes for example promotion from the Community Content or changes to foundational hierarchies likely to have impact across other content. Cross check that all MRCM changes have been made and the associated content changes completed (i.e. no MRCM errors on Main). No further changes to MRCM.
May 7, 2026	17:00	SI Release Manager	Verify with Content Release Lead any new moduleDependency/RefsetDescriptor records required for this cycle... Validate automatically generated moduleDependency/RefsetDescriptor records for this release, AND IF ANY ISSUES: Create the moduleDependency/RefsetDescriptor records for this release
May 7, 2026	17:00	SI Release Manager	Create the Release Notes based on last month's page, in order to save time with repeating statements, etc Verify the new schedule against the previous month, to ensure no refinements were made but not propagated through to this month.
May 13, 2026	09:00	SI Content Release Lead	Notify Content Team about forthcoming release close and aim to complete project promotion in advance of cut off to prevent last minute issues for the Mapping Team.
May 14, 2026	12:00	SI Content Release Lead	Last day for the Content team to promote any changes intended for release in the current editing cycle. 12.00 UTC - CONTENT CUT OFF - Final project promotion Content team may continue to author after final project promotion and until the authoring platform is under maintenance window, but must not delete any new concepts or components that have already been promoted for the release. No project promotion until further notice. Submit INFRA ticket for project promotion to be disabled in the authoring platform until further notice.
May 14, 2026	14.00	SI Release Team	Initial handover meeting - once all signed off, full validation of initial content + fixing of all issues that it is possible to resolve before versioning (cannot move this meeting earlier as Content Release Lead needs enough time to run full validation after cut-off before this handover meeting)
May 15, 2026	00:01 - 05:00	WCI	00:00 - WCI to SUSPEND DRIP FEED FOR TONIGHT AND TOMORROW NIGHT 02:20 - SI Devops to schedule automated rundeck job for 02:20 on the Friday before Versioning - this will completely remove SNOMED from the Mapping Server + upload the latest version. 03:00 - WCI to validate the Release Mapping Server 04:00 - WCI to lift maintenance window and allow Mapping Team to access other projects ONLY (GMDN, MedDRA, etc)
May 15, 2026	09:00	SI Mapping Team	Mapping team to finalise any mapping from the final content promotion after the 12:00 content cut off previous day (or any issues identified during the Mapping Server validation process), and then Resolve their "Mapping Complete" ticket to confirm that "Mapping QA complete". NB: this is using the content from yesterday's final promotion cut off at 12:00, as the Daily Build feed then ran at 01:00
May 15, 2026	09:00	SI Content Release Lead	Final content review and validation in the current release branch: Confirm root concept has been updated. Review RVF report. Review MRCM report. Check the exceptions list for all components listed during the current release cycle. Run all reporting platform release validation reports, save link to reports. Run all reporting platform release statistic reports, save link to reports. Spell check/ check descriptions file for inaccuracies or typos.
May 15, 2026	09:00	SI Release Manager	Check that SEP + lateralizable refset generation process has been run before kicking off test build(s).
May 15, 2026	12:00	SI Mapping Team	12:00 - MAPPING CUTOFF (This is using the content from last night's Daily Build feed (run at 01:00))
May 15, 2026	12:00	SI Content Release Lead	SI Content Release Lead to run map process: https://docs.google.com/document/d/1IeDzxSNxygOlW9X0DKZ6yacWDuz9T0YOoqU-IuDAvHM/edit?usp=sharing confirm with SI Map lead that the Mapping cut off was completed successfully at 12:00 create 2x new tasks in authoring platform project 'Release mapping upload project', to accept the upload of the new Map files Delta's (one for SimpleMap + one for ExtendedMap delta files). upload the new map Delta files into the branches, validate + promote the two Map file tasks to MAIN Backup plan: If there is a Critical (P1) issue found in the final content (shouldn't be due to the new task/project validation, but we need an emergency process just in case), then WCI can import a specific fix branch straight into the Cloned Release Mapping Server, without bleed through from the next month's content. However, this should only be used in the genuine emergency situations... confirm to SI Release Manager once complete, and full Release validation can begin.
May 18, 2026	09.00	SI Release Manager	For the first few releases the SI Release Manager should run an initial full Release against the UN-VERSIONED content, to ensure no failures in the "Traceability Service" assertion(s) in the RVF report. These will provide advanced notice of the type of failures we currently don't find until Release time (items missing from the RF2 manifest, package formatting issues, etc), so that they can be fixed well before the release. Versioning to proceed once SI Release Manager confirms that there are no Critical issues in this build. ***** NOTE there will be some false positives in the new Traceability Assertions (assertionUuid: "b7f727d7-9226-4eef-9a7e-47a8580f6e7a") until the map files can be finalised and uploaded to the termserver (see below) the number of failures should exactly match the number of records across BOTH map file delta's - so if this is the case these can be ignored until the map files are uploaded to the termserver in a few days...
May 18, 2026	16:00	SI Devops Team	If any Critical fixes have been required, we need to: Push them back through to MAIN before versioning Re-run the Daily Build manually in order to ensure that the Mapping Server picks up the latest version
May 19, 2026	15:00	SI Release Team	Final handover meeting - final cross check to ensure that all Release validation complete, and any last minute tasks (refset generation, final Mapping updates from last night's drip feed, etc) are complete before versioning green light.
May 20, 2026	09:00 - 17:00	SI Devops Team	Technical team release tasks (as and when initial validation is signed off at each milestone) * Maintenance screen to be raised in Production * termServer branching and Release versioning (DevOps to raise tickets themselves as per Terance's request) VERSIONED BRANCH SENT TO SI Release Manager FOR FINAL VERIFICATION (see below) BEFORE CONTINUING FINAL TASKS... Snapshot used to provisionally bring the AP validation etc back up again today, so that it works for the interim period until the new Production release package is signed off tomorrow Provisional date to drop Maintenance & re-open Content authoring for next editing cycle - providing no Critical issues identified... * Maintenance screen to be lifted in Production * Once authors confirm Editing has re-commenced: run the test upload into Dev browser to ensure no issues. re-configure the Daily Build + Daily Build browser to work in the next Editing cycle - Browser Daily Build Process Performing this step early allows the daily build to report on the next monthly release content, for both authoring validation and external use. New unreleased content will hidden in the main browser until the effectivetime. If any content has to be removed due to urgent issues we will need to back-out and reimport the International data. Reminder to WCI to cut off mapping drip feed (but NOT clone over to Release Server until Mapping Team confirms that both ICD-0/ICD-10 + GMDN maps are all updated based on Content + latest GMDN content.
May 20, 2026	09.30	SI Release Manager	New versioned Release Build (including both ICD-0 + ICD-10 maps from termServer) is created and validated by SI Release Manager ***************************************************************************************************************************************** THIS BUILD MUST BE DONE WITH x PREFIXES REMOVED + USING PRODUCTION NAMING CONVENTIONS SO DEVOPS CAN USE IT *************************************************************************************************************************************** * MANIFEST CHANGED TO PULL MAP FILE DATA FROM SNOWSTORM INSTEAD OF EXTERNALLYMAINTAINED FOLDERS ****
May 20, 2026	12:00	SI Release & Devops teams	Update the devops Report ticket with the relevant 2x release packages so there's no confusion, PLUS DevOps to run new SCS Report (eg) INFRA-8071 - Generate the Summary Component Stats Report CLOSED
May 20, 2026	18:00	SI Content Release Lead	Approximately 18.00 UTC - AUTHORING + MAPPING RE-COMMENCE Restart content editing for the next release cycle in the new release branch on authoring platform. Project promotion is also clear to commence from this point onwards. @Maria Braithwaite SEND NOTICE to Content team members - all existing tasks must be rebased to prevent problems with the classification (until we can automate all rebases then rebasing the tasks is also needed. Dev Ops will still rebase all projects each release). Mapping Drip Feed switched back on (but mapping tool will not be back up to date until first drip feed run later tonight).
May 21, 2026	01:00 - 09:00	WCI (AUTOMATED)	01:00 - Daily Build first run after Versioning 02:00 - Mapping Drip feed first run after Versioning - WCI to inform SI Mapping Team that they can re-commence mapping
May 21, 2026	09:00	SI Mapping Team	Re-start International Mapping work for the next cycle.
May 21, 2026	13:00	SI Release Manager SI Mapping Team WCI	DR PLAN: If there is a Critical (P1) issue found in either the Map files or the final SNOMED CT content (shouldn't be due to the new task/project validation, but we need an emergency process just in case), then WCI can import a specific fix branch straight into the Cloned Release Mapping Server, without bleed through from the next month's content. However, this should only be used in the genuine emergency situations...
May 21, 2026	13.00	SI Release & Devops teams	Once Final, versioned Release Build is signed off by SI Release Manager, it is handed over to DevOps to update the Daily Build, plus all AP validations, etc As this can take a few hours or even more, in the interim DevOps will use the provisional Snapshot release from the versioning process in order to ensure minimal downtime for these services.
May 21, 2026 May 25, 2026	09:00	SI Release Manager SI Content Release Lead	Full manual + automated validation of the versioned content. Lateralizable and SEP ref sets.
May 18, 2026 May 21, 2026	09:00	SI Content + Mapping Teams	Preparation of release notes.
May 22, 2026	12:00	SI Content Release Lead	Handover of release notes to SI Release Manager.
May 25, 2026			SPRING BANK HOLIDAY
May 25, 2026 May 29, 2026	09:00	SI Release Manager	Build final Production release. Run full regression testing and fix any subsequent issues.
May 29, 2026	17:00	SI Release Manager	As early as possible, send DevOps the final PROD Release package, to upload into the Browser, etc in readiness for the Release day (the data will remain hidden within the browser until 1st of the month at 00:01)
Jun 1, 2026	17:00	SI Release Manager	PRODUCTION RELEASE to community Include full comms to explain process + package changes due to Frequent Delivery Confirm how the standard Monthly releases will look from this point onwards Include notes that Delta Generation Tool is available to use if they'd like
Jun 2, 2026	09:00	SI Devops Team	Once Release Manager confirms Production release is published: Update all Production systems (authoring platform, browser) using the final S3 published package. This needs to include the new Release Stats page in the browser (https://browser.ihtsdotools.org/qa/#/descriptive-statistics), which can be updated using step 7 ("If this is the final INT release we need to also update the Stats") in these instructions: https://snomed.atlassian.net/wiki/display/DEVOPS/Browser+Release+Updates NOTE: For the initial soft launch Releases this will just be tested in Dev/Uat browser rather than Prod to avoid confusing users From September 2020 ensure that the GPS ValueSet is available through the FHIR API ie https://browser.ihtsdotools.org/fhir/ValueSet/gps Update both the: Release Stats Summary Report: https://confluence.ihtsdotools.org/pages/viewpage.action?spaceKey=RMT&title=SNOMED+CT+Release+Stats+Summary+report Individual Release Stats Report: https://snomed.atlassian.net/wiki/display/RMT/SNOMED+CT+Release+Statistics+Report+-+July+2016+edition Check this through with Peter as likely unnecessary now with new reports...

Team Notifications:

Team	Stakeholders to notify

Team	Stakeholders to notify
SI Release Manager	@Andrew Atkinson
SI Content Release Lead	@Maria Braithwaite
SI Devops Team	@Terance Shird + @Joe Cameron-Schofield+ @Chris Morris+ @Lee Chapman
SI Content Team	@Maria Braithwaite + @Monica Harry+ @Yongsheng Gao+ @Suzanne Santamaria+ @Farzaneh Ashrafi
SI Mapping Team	@Donna Morgan+ @Michael Harwood-Jones
WCI	@Rick Wood+ @Deborah Shapiro+ @WCI Support