Your resource list is fine, but the problem will be that the events themselves don t contain a resource ID when they are fetched from the Google Calendar - because the calendar has no concept of "resources"...instead you ve used different calendars to represent the different rooms. Therefore fullCalendar can t match the event to a specific resource, in order to know where to display it. You can overcome this by adding a per-event-source data transform. The event source documentation notes that you can add an eventDataTransform callback specifically for that source. The eventDataTransform callback allows you to manipulate the data of each event after it s been downloaded from the source, but before it s passed to fullCalendar s rendering functionality. You can use that to add the relevant resource ID to each downloaded event, in order to map the Google Calendar rooms to a fullCalendar resource. For example: initialView: resourceTimeGridDay , resources: [ { id: a , title: Room Alpha }, { id: b , title: Room Bravo }, { id: c , title: Room Charlie }, { id: c , title: Room Delta }, { id: d , title: Room Echo } ], googleCalendarApiKey: api-key , eventSources: [ { // Room Alpha googleCalendarId: calendar-id-room-alpha@group.calendar.google.com , backgroundColor: #8ecae6 , eventDataTransform: function(eventData) { eventData.resourceId = a ; return eventData; } }, { // Room Bravo googleCalendarId: calendar-id-room-bravo@group.calendar.google.com , backgroundColor: #219ebc , eventDataTransform: function(eventData) { eventData.resourceId = b ; return eventData; } }, { // Room Charlie googleCalendarId: calendar-id-room-charlie@group.calendar.google.com , backgroundColor: #023047 , eventDataTransform: function(eventData) { eventData.resourceId = c ; return eventData; } }, { // Room Delta googleCalendarId: calendar-id-room-delta@group.calendar.google.com , backgroundColor: #ffb703 , eventDataTransform: function(eventData) { eventData.resourceId = d ; return eventData; } }, { // Room Echo googleCalendarId: calendar-id-room-echo@group.calendar.google.com , backgroundColor: #fb8500 , eventDataTransform: function(eventData) { eventData.resourceId = e ; return eventData; } } ],