This roundup marks anniversaries and birthdays of people and events, from the reopening of Vienna's State Opera to the 1955 rebirth of a destroyed landmark.

• Vienna State Opera restoration
• Sikhism
• women's education
• +1

A filmmaker turns her private, reluctant grandfather's story into a puzzle-driven documentary, The Grandfather Puzzle, part of the JoyDrops series.

• documentary filmmaking
• Holocaust memory and family history
• JoyDrops documentary series

A University of Reading master's student has made a chocolate bar entirely from British-grown ingredients, using cocoa grown in the university's greenhouses.

• cocoa cultivation
• climate change adaptation in agriculture
• International Cocoa Quarantine Centre
• +2

A village in northern England runs social care as shared community life rather than a professional service, and its residents say it has changed their lives.

• social care
• learning disabilities
• Camphill movement
• +2