Unable To Retrieve Calendar Data From Freebusy Query

I'm trying to get the busy free times from my calendar. Here is my code: var freeRequest = gapi.client.calendar.freebusy.query({ timeMin: (new Date(2016, 3, 1)).toISOString(),

Solution 1:

Add items to your request like this:

var freeRequest = gapi.client.calendar.freebusy.query({
    items: [
      {id: "calendar id"}
    ],
    timeMin: (newDate(2016, 3, 1)).toISOString(),
    timeMax: (newDate(2016, 3, 30)).toISOString()
});

The calendar id can be found like this.