Month, week and day grids, click-click and drag range selection over days or time slots with disabled units and length limits, WAI-ARIA grid keyboard movement, timed-item placement with overlap columns, and availability maths (free time, everyone-free overlap, slot starts). Native Date helpers with date-fns names.
npx shadcn@latest add https://eased.dev/r/eased-calendar-core.jsoneased-calendar-core