Every Christmas, we all become accidental data analysts. We forecast gift demand: “Will the kids still like Bluey next week?” We model supply chain risk: “Will the prawns sell out by Christmas Eve?” We predict capacity: “How many chairs do we actually  need this year?” And we optimise resources: “If the oven’s at 180 °C, can the potatoes and turkey share space and how long for?”. Christmas runs on data but most of us are still working off gut feel, last year’s patterns or fam