As seen in Bluestocking volume 308: "Respect to the Japanese here for having data that goes back to the ninth century."
Interactive plot: https://ourworldindata.org/grapher/date-of-the-peak-cherry-tree-blossom-in-kyoto
Where I saw this:
https://helenlewis.substack.com/p/the-bluestocking-vol-308-f1-and-enron
