Google Calendar — Day View

Google Calendar — Day View Frontend / Backend Split: 40% Backend · 60% Frontend Google Calendar Day View is frontend-heavy — but the backend is non-trivial. The frontend solves: virtual scrolling a 24-hour grid, drag-and-drop with snapping, overlapping event layout (interval partitioning), and RRULE expansion. The backend solves: ACID event storage, conflict resolution for concurrent edits, and fan-out notifications to shared calendar members. Both sections get full coverage. 1. Problem + Scope Design the Google Calendar Day View — a time-grid UI that displays all events for a single day, supports creating/editing/deleting events via drag, resize, and click, handles recurring events, and broadcasts real-time updates to shared-calendar collaborators. In scope: Day view grid, event CRUD, drag & resize, recurring events (RRULE), overlapping event layout, real-time collaboration on shared calendars, all-day events, timezone rendering. Out of scope: Meeting Room booking, Google Meet integra