When you provide a timestamp or JavaScript Date object, lightning:relativeDateTime displays a string that describes the relative time between the current time and the provided time. Sample code: Component: <aura:component implements = “force:appHostable”>              <aura:attribute name=“pastDay” type=“Object”/>       <aura:attribute name=“today9AM” type=“Object”/>       <aura:attribute name=“now” type=“Object”/>       <aura:attribute name=“futureday” type=“Object”/>       <aura:handler name=“init” value=“{! this }” action=“{! c.init }” />                  <div class=“slds-box slds-theme_default”>               <div class=“slds-m-vertical_small”>               Past Date:               <strong><lightning:relativeDateTime value=“{! v.pastDay }”/></strong>           </div>                  <div class=“slds-m-vertical_small”>               Today 9:00 AM:               <strong><lightning:relativeDateTime value=“{! v.today9AM }”/></strong>           </div>                  <div class=“slds-m-vertical_small”>               Right now:               <strong><lightning:relativeDateTime value=“{! v.now }”/></strong>           </div>                  <div class=“slds-m-vertical_small”>   … Continue reading lightning:relativeDateTime