Add the 3rd hackathon's blog post

blog/_posts/2026-03-25-root-hackathon-3.md

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+ title: "🚀 3rd ROOT Hackathon: The Fixathon 2.0"
+ layout: archive
+ author: Silia Taider
+---
+
+# 📅 11-12 May 2026 | 📍 CERN, IdeaSquare
+
+We’re excited to announce the **3rd ROOT Hackathon**, taking place at CERN’s [IdeaSquare: the Innovation Space of the lab](https://ideasquare.cern/)!
+
+This edition -The Fixathon 2.0 - is a **2-day hands-on** event focused on refining ROOT through small but impactful improvements.
+
+## 🔧 What will we work on?
+
+- 🐞 Small Bug Density issues: addressing well-scoped issues that improve the everyday ROOT experience
+- 📚 Documentation improvements: writing or improving tutorials, examples, and documentation pages
+
+
+## 🤝 How to participate?
+
+Do you have a small ROOT issue that has been on your mind?
+
+**Report it ➡️ Tag it `Small Bug Density` on GitHub ➡️ Join us to work on it!**
+
+## 🍝 Logistics
+- 📍 In-person at CERN IdeaSquare (no remote participation)
+- ☕ Coffee and home-cooked lunches provided
+- 🍽️ Social dinner organised nearby (not covered)
+- ⚠️ Limited spots available
+
+### 👉 More details & registration: https://indico.cern.ch/event/1663083/
+
+<center>
+    <img
+    src="{{'/assets/images/blog/posts/2026-03-25-root-hackathon-3/hackathon-poster.png' | relative_url}}"
+    style="width: 100%" />
+</center>
+
+Looking forward to hacking together!
+
+#ROOT #CERN #Hackathon #OpenSource #HEP #SoftwareDevelopment #IdeaSquare