Sample Date Facet Range that can be used for showing facet label like: 30 minutes ago, 1 hour ago etc.

date-range-facets.sample.json

{
  "query": {
    "match_all": {}
  },
  "facets": {
    "dtmPosted": {
      "range": {
        "key_script": "doc['dtmPosted'].date.getMillis()",
        "value_script": "doc['dtmPosted'].date.getMillis()",
        "ranges": [
          {
            "from": 1310665698000,
            "to": 1310667498000
          },
          {
            "from": 1310663898000,
            "to": 1310665698000
          },
          {
            "from": 1310660298000,
            "to": 1310663898000
          },
          {
            "from": 1310649498000,
            "to": 1310660298000
          },
          {
            "from": 1310631498000,
            "to": 1310649498000
          },
          {
            "from": 1310581098000,
            "to": 1310631498000
          },
          {
            "from": 1310494698000,
            "to": 1310581098000
          },
          {
            "from": 1310408298000,
            "to": 1310494698000
          },
          {
            "from": 1310321898000,
            "to": 1310408298000
          },
          {
            "from": 1310235498000,
            "to": 1310235498000
          },
          {
            "from": 1310149098000,
            "to": 1310235498000
          },
          {
            "from": 1310062698000,
            "to": 1310149098000
          },
          {
            "from": 1309976298000,
            "to": 1310062698000
          },
          {
            "from": 1309889898000,
            "to": 1309976298000
          },
          {
            "from": 1309803498000,
            "to": 1309889898000
          },
          {
            "to": 1309803498000
          }
        ]
      }
    }
  }
}

the above JSON snippet is based on the following "Elastica_Facet_Range" configuration:

    $facets  = new Elastica_Facet_Range("dtmPosted");
    $facets->setKeyValueScripts("doc['dtmPosted'].date.getMillis()", "doc['dtmPosted'].date.getMillis()");
    $now = time();
    $facets->setRanges(
       array(
           array('from' => strtotime("-30 minutes", $now) * 1000, 'to' => $now * 1000),
           array('from' => strtotime("-1 hour", $now) * 1000, 'to' =>strtotime("-30 minutes", $now) * 1000),
           array('from' => strtotime("-2 hour", $now) * 1000, 'to' => strtotime("-1 hour", $now) * 1000),
           array('from' => strtotime("-5 hour", $now) * 1000, 'to' => strtotime("-2 hour", $now) * 1000),
           array('from' => strtotime("-10 hour", $now) * 1000, 'to' => strtotime("-5 hour", $now) * 1000),
           array('from' => strtotime("-1 day", $now) * 1000, 'to' => strtotime("-10 hour", $now) * 1000),
           array('from' => strtotime("-2 day", $now) * 1000, 'to' => strtotime("-1 day", $now) * 1000),
           array('from' => strtotime("-3 day", $now) * 1000, 'to' => strtotime("-2 day", $now) * 1000),
           array('from' => strtotime("-4 day", $now) * 1000, 'to' => strtotime("-3 day", $now) * 1000),
           array('from' => strtotime("-5 day", $now) * 1000, 'to' => strtotime("-5 day", $now) * 1000),
           array('from' => strtotime("-6 day", $now) * 1000, 'to' => strtotime("-5 day", $now) * 1000),
           array('from' => strtotime("-7 day", $now) * 1000, 'to' => strtotime("-6 day", $now) * 1000),
           array('from' => strtotime("-8 day", $now) * 1000, 'to' => strtotime("-7 day", $now) * 1000),
           array('from' => strtotime("-9 day", $now) * 1000, 'to' => strtotime("-8 day", $now) * 1000),
           array('from' => strtotime("-10 day", $now) * 1000, 'to' => strtotime("-9 day", $now) * 1000),
           array('to' => strtotime("-10 day") * 1000),
       )
    );