How would you design a relational schema for a calendar application?

To design a relational schema for a calendar application, I would focus on the following core entities:

1. Users: Stores user information like user_id, email, first_name, and last_name.
2. Calendars: Represents individual calendars, with fields such as calendar_id, user_id (foreign key to Users), calendar_name, default_view, and timestamps for creation/update.
3. Events: Details about each event, including event_id, calendar_id (foreign key to Calendars), title, description, start_time, end_time, and recurrence information.
4. Event_Attendees: Links users to events, specifying event_id, user_id, role (e.g., organizer, attendee), and response_status (e.g., accepted, declined).
5. Reminders: Manages notifications for events, with reminder_id, event_id (foreign key to Events), reminder_time, and notification_method (e.g., email, push).

This structure allows for multiple calendars per user, events within those calendars, and flexible attendee management and reminders.