I don't have enough context provided to write an accurate overview of "Category:Categories by decade." You've indicated it's a Wikimedia category, but haven't included the actual category description or content details that would allow me to explain what it is and why it matters without inventing information. Could you provide the category's description or content?
AI-generated from the Wikipedia summary — may contain errors.
This is a container category. Due to its scope, it should contain only subcategories.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).