CalendarCN: Open-Source Next.js Event Calendar Built with shadcn/ui

CalendarCN: an open-source React calendar component built with shadcn/ui and Tailwind CSS 4, running on Next.js 16 and React 19. It ships with day/week/month views, light/dark theme switching, seven event color options, all-day event support, a real-time current-time indicator, a collapsible sidebar with a mini date picker, multi-calendar visibility toggles, and keyboard shortcuts for navigation. 👉 Blog Post 👉 GitHub Repo 👉 Live Demo