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, major/minor
Day 10, physical
Day 11, mobile friendly
Day 12, theme day: Reuters Graphics
Day 13, family
Day 14, heatmap
Day 15, historical
Day 16, weather
Day 17, networks
Day 19, dinosaurs
Day 20, correlation
Day 22, mobility and day 23, tiles