30DayChartChallenge 2024 April 29, 2024 30DayChartChallenge & Olympic games & women & sports & map & cities & pool & water & AI & injuries & twins & heatmap & metro & Paris & dinosaur & LGBT & Tokyo & Data Visualization Day 1, part-to-whole Day 2, neo Day 3, makeover Day 4. waffle Day 5, diverging Day 6, OECD Day 7, hazards Day 8, circular Day 9, X February 4, 2012 metro & people & stockholm & street & underground & photography Stockholm, Sweden