Date format: remove time, keep month-day-year

I'm using Logstash to parse a CSV file which has fields in the following format:

  • AssignmentDate (column header)
  • 2/15/2016 (value)

If I open the CSV with Sublime Text, this value is shown like this:

Feb 15, 2016

In my index template:

"mappings": {
  "learning_plan_reports_data": {
    "date_detection": false,
    "properties": {
      "AssignmentDate": {
        "type": "date",
        "include_in_all": false,
        "format": "MMM dd, yyyy||MMM d, yyyy"
      },

Unfortunately, once this information gets through to Kibana, I'm seeing this:

 AssignmentDate 		February 15th 2016, 16:00:00.000

...what I'd like to obtain is this:

 AssignmentDate 		February 15th 2016

Any suggestions? Thank you.

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