Koyomi (暦) adds date pickers to a Phoenix app.

It ships a prebuilt picker bundle, the components that render it, Ecto types for what it posts, and the rules that the browser and the server share, so a Phoenix app gets date, range, time and recurrence fields with no Node.js build step of its own.

Start with the Quickstart, then the Pickers and Rules guides. The main modules are Koyomi.Components (the pickers), Koyomi.Rules and Koyomi.Changeset (what may be chosen), Koyomi.Live (the LiveView helpers) and Koyomi.Test (the test helpers).