@spalger/kibana/src/plugins/kibana/public/settings/sections/indices/_field_name.html

Kibana is an open source (Apache Licensed), browser based analytics and search dashboard for Elasticsearch. Kibana is a snap to setup and start using. Kibana strives to be easy to get started with, while also being flexible and powerful, just like Elastic

<span>{{field.displayName}}</span>
&nbsp;
<span
  ng-if="indexPattern.timeFieldName === field.name"
  tooltip="This field represents the time that events occurred."
  class="label label-default">
  <i aria-hidden="true" class="fa fa-clock-o"></i>
</span>