add page for EESSI hackathon at EuroHPC User Days 2026

docs/training-events/2026/hackathon-eurohpc-user-days.md

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+# EESSI hackathon (25 Sept 2026, Dublin)
+
+On Friday 25 September 2026, an EESSI hackathon will be organised in the wake of the
+[EuroHPC User Days 2026](https://userdays2026.eurohpc-ju.europa.eu)
+which takes place 22-24 September 2026 in Dublin (Ireland).
+
+*organised by [EuroHPC Centre-of-Excellence MultiXscale](https://www.multixscale.eu)*
+
+!!! tip
+    **This is primarily an in-person event, with space for about 25 on-site participants.**
+
+    Attending the sessions is free, but you must be registered to attend in person or to join the Zoom webinar session for online participation!
+
+    See also [Registration](#registration).
+
+The main topic of this hackathon will be *onboarding software into
+the European Environment for Scientific Software Installations (EESSI, [https://eessi.io](https://eessi.io))*.
+
+Ample time will be provided for participants to follow prepared examples, as well as time to work on onboarding their own application codes into EESSI.
+
+We intend to record this event, and the make recordings, slides, and materials
+publicly available shortly after the event via this page.
+
+More details on the program will be shared later.
+
+**If you have any questions regarding this event, please send an email to `support@eessi.io`.**
+
+<!--
+!!! danger "Raspberry Pi Starter Kit prize!"
+    For the on-site participants of the hackathon, a **Raspberry Pi 5 Starter Kit prize** will be awarded to the most impressive project!
+
+    <p align="center">
+        <img width="40%" src="../../../img/raspi.png" alt="Prize">
+    </p>
+-->
+
+## Presentation materials
+
+*(will be made available shortly before the event)*
+
+## Venue
+
+The event will take place at Trinity College in Dublin.
+
+*(more details will be available soon)*
+
+## Online
+
+Online participation is available via Zoom *(practical information to join will be shared with registered participants)*.
+
+## Format
+
+- Hybrid format
+    - Space for 25 in-person attendees
+    - Online participation via Zoom
+- Mix of presentation & hands-on exercises
+    - ~2.5h of content
+    - ~2.5h for hands-on
+    - ~30min for final Q&A
+
+## Registration
+
+Both in person and online attendance is free of charge, but registration is required.
+
+**Register via [https://event.ugent.be/registration/eessi202609](https://event.ugent.be/registration/eessi202609)**
+
+## Agenda
+
+*(more info soon)*
+
+<!--
+* `[09:00-09:15]` Informal welcome + practical info
+* `[09:15-09:45]` Round table: introduce yourself
+* `[09:45-10:15]` Quick refresher on EESSI & EasyBuild *[Lara + Helena]*
+* `[10:15-10:45]` EESSI for Continuous Integration (CI) *[Alan]*
+* `[10:45-11:00]` *(short break)*
+* `[11:00-11:30]` EESSI for Continuous Integration (CI), continued *[Alan]*
+* `[11:30-12:00]` EESSI for Continuous Deployment (CD) *[Alan]*
+* `[12:00-12:30]` *(short lunch break)*
+* `[12:30-15:45]` Hands-on session (with support from EESSI team members)
+    * `[12:30-12:45]` Quick presentation, different scenarios *[Kenneth]*
+    * `[12:45]` Start with guided exercise (at your own pace)
+    * Follow-up with pick your own adventure (medium/advanced)
+    * Online participants: ask for help in [`#cicd` channel in EESSI Slack](https://eessi-hpc.slack.com/archives/C096B9JSD0C)
+        * Join EESSI Slack via [`Slack channel` link on EESSI website](https://www.eessi.io)
+        * Ask to jump in Zoom breakout room to have 1-on-1 with EESSI team member
+* `[15:45-16:00]` *(short break)*
+* `[16:00-16:30]` Show & tell *(optional)*
+    * Both for in-person and online participants
+* `[16:30-16:55]` Q&A
+* `[16:55-17:00]` Raspberry Pi start kit prize for most impressive project *(in-person only!)*
+-->
+
+## Preparatory Material
+
+While most of the content will be introduced on the day, it is likely very beneficial to follow some topics from the recent EESSI webinar series relevant to the hackathon:
+
+- [Introduction to EESSI (April 2026)](webinar-series-2026Q2.md#introduction-to-eessi)
+- Introduction to EasyBuild (May 2026): [slides](https://users.ugent.be/~kehoste/Introduction-to-EasyBuild-20260519.pdf) - [recording](https://youtu.be/1sfw8a64wFg?si=Z3ebqgKvjkdlTM7N)
+
+Some familiarity with [Git](https://swcarpentry.github.io/git-novice/) is useful, as is some experience with building and/or installing software packages.
+
+## Q&A via Slack
+
+For posting questions or comments during the event, we strongly prefer that you post them
+in the **`#hackathon` channel in the EESSI Slack** ([direct link to that channel](https://eessi-hpc.slack.com/archives/C02NB46EK9P)).
+
+If you haven't joined the EESSI Slack yet, first use the "`Slack channel`" link on the [EESSI website (https://eessi.io)](https://eessi.io).
+
+There will also be an opportunity to ask questions directly to the speakers, should you wish to do so.
+
+## Useful links
+
+- EESSI website: [https://eessi.io](https://eessi.io)
+- EESSI documentation: [https://eessi.io/docs](https://eessi.io/docs)
+- EasyBuild website: [https://easybuild.io](https://easybuild.io)
+- EasyBuild documentation: [https://docs.easybuild.io](https://docs.easybuild.io)
+- MultiXscale website: [https://www.multixscale.eu](https://www.multixscale.eu)
+
+## Organisers
+
+- Kenneth Hoste (Ghent University)
+- Alan O'Cais (freelancer EuroHPC projects for Ghent University)
+- Lara Peeters (Ghent University)

docs/training-events/index.md

@@ -2,6 +2,7 @@
 
 ## Upcoming events (2026)
 
+* [*EESSI Hackathon @ EuroHPC User Days 2026*](2026/hackathon-eurohpc-user-days.md) (hybrid event, 25 September 2026)
 * [*EESSI happy hour sessions 2026*](./happy-hours-sessions.md) (online sessions **every** Monday, starting 12 January 2026)
 
 ### Past events (2026)
@@ -15,7 +16,7 @@
 
 ### Past events (2025)
 
-* [*EESSI CI/CD Hackathon*](2025/hackathon-eurohpc-user-days.md) (hybrid event, 2 October 2025)
+* [*EESSI CI/CD Hackathon @ EuroHPC User Days 2025*](2025/hackathon-eurohpc-user-days.md) (hybrid event, 2 October 2025)
 * [*EESSI happy hour sessions 2025*](2025/happy-hours-previous-sessions.md) (online sessions every Monday, starting 18 August 2025)
 * [*EESSI webinar series (May-June 2025)*](2025/webinar-series-2025Q2.md) (online tutorials)
     * [**Introduction to EESSI** *(5 May 2025)*](2025/webinar-series-2025Q2.md#introduction-to-eessi)