{
  "startDate": ISODate("2015-01-01T00:00:00Z"),
  "endDate" : ISODate("2015-01-10T00:00:00Z"),
  "foo" : "bar"
}

{
 "dates": [
           ISODate("2015-01-01T00:00:00Z"),
           ISODate("2015-01-02T00:00:00Z"),
           ISODate("2015-01-03T00:00:00Z"),
           ISODate("2015-01-04T00:00:00Z"),
           ISODate("2015-01-05T00:00:00Z"),
           ISODate("2015-01-06T00:00:00Z"),
           ISODate("2015-01-07T00:00:00Z"),
           ISODate("2015-01-08T00:00:00Z"),
           ISODate("2015-01-09T00:00:00Z"),
           ISODate("2015-01-10T00:00:00Z")
        ]
}

{
"_id" : ObjectId("55474c322e8f6b5a9dda1a0f"),
"dates" : [
    ISODate("2015-01-01T00:00:00.000Z"),
    ISODate("2015-01-02T00:00:00.000Z"),
    ISODate("2015-01-03T00:00:00.000Z"),
    ISODate("2015-01-04T00:00:00.000Z"),
    ISODate("2015-01-05T00:00:00.000Z"),
    ISODate("2015-01-06T00:00:00.000Z"),
    ISODate("2015-01-07T00:00:00.000Z"),
    ISODate("2015-01-08T00:00:00.000Z"),
    ISODate("2015-01-09T00:00:00.000Z"),
    ISODate("2015-01-10T00:00:00.000Z")
]
}

//Example using subdocs
{
"_id" : ObjectId("55474e332e8f6b5a9dda1a10"),
"dates" : [
    {
        "date" : ISODate("2015-01-01T00:00:00.000Z")
    },
    {
        "date" : ISODate("2015-01-02T00:00:00.000Z")
    },
... etc

  //using embedded docs
  db.rangeTest.find(
 {'dates.date': {$gte:ISODate("2015-01-08T00:00:00.000Z"), $lte:ISODate("2015-01-09T00:00:00.000Z")}},
{_id:0, 'dates.$':1} )