Field Grouping in JSON module

I have the module currently set up to display a feed of events via JSON such as

{
  "events" : [
    {
      "event" : {
        "title" : "OCAC 20th Anniversary Teapot Show",
        "event_date" : "<span class=\"date-display-start\" property=\"dc:date\" datatype=\"xsd:dateTime\" content=\"2013-01-10T12:00:00-08:00\">January 10, 2013</span> to <span class=\"date-display-end\" property=\"dc:date\" datatype=\"xsd:dateTime\" content=\"2013-01-30T12:00:00-08:00\">January 30, 2013</span>",
        "node_path" : "/ocac-20th-anniversary-teapot-show",
        "body" : " <p>Celebrating 20 years of the Teapot Class at OCAC with over 30 teapots from our alumni around the United States.</p>\n<p>Entering its 20th year, OCAC’s 3rd Year Teapot Class provides an essential step in developing the vocabulary of a metal smith. Focusing on traditions dating back to ancient history that are still practiced today—raising and forming, large scale soldering and fitting processes—students design and create a functional teapot in one semester. Making decisions about construction methods and design, choosing materials for handles, and studying historical and contemporary examples of teapots and other hollowware, students have the opportunity to deepen their understanding of the creation of utilitarian objects and how to balance design and function. This intensive experience prepares OCAC students for careers as professional makers.</p>\n<p>See more of the show <a href=\"http://www.flickr.com/photos/ocacedu/sets/72157632591699021/\">here</a></p>\n ",
        "event_location" : "HOFFMAN GALLERY",
        "sub_heading" : "Opening Reception | Thursday, January 10 | 4-7:30pm",
        "body_subtext" : "artist: Sarah Hall",
        "event_image" : "https://syndication.ocac.edu/sites/syndication.ocac.edu/files/styles/medium/public/teapotonwheels.jpg?itok=31aRBoPB",
        "node_link" : "<a href=\"/ocac-20th-anniversary-teapot-show\">view</a>",
        "photo_credit" : "Beth Conyers",
        "taxonomy_terms" : "<a href=\"/taxonomy/term/5\" typeof=\"skos:Concept\" property=\"rdfs:label skos:prefLabel\" datatype=\"\">Oregon College of Art and Craft</a>",
        "update_date" : "Friday, April 5, 2013 - 10:08"
      }
    },
...
]
}

It works well, but ultimately, I would like to group these events (via JSON) by date (i.e. "January 21, 2013") and have all events on that date be displayed.

Is this possible?