<div class="ipsType_center memExperience" data-ipstooltip="">
    {{$joinDate = $comment->author()->get_joined(); $currentDate = new \DateTime(); $interval = $joinDate->diff($currentDate); $experience = \IPS\DateTime::formatInterval($interval, 1); $months = $interval->m + ($interval->y * 12); $class = 'default';}}

<!-- 3-6 months -->
{{if $months >= 3 && $months < 6}}
    <li class="ipsResponsive_hidePhone memCustomFields"><span class="xpnew">{$experience} {lang="memberexperience_experience"}</span></li>
<!-- 6 months ~ 1 year -->
{{elseif $months >= 6 && $months < 12}}
    <li class="ipsResponsive_hidePhone memCustomFields"><span class="xphalf">{$experience} {lang="memberexperience_experience"}</span></li>
<!-- 1 Year -->
{{elseif $months >= 12 && $months < 24}}
    <li class="ipsResponsive_hidePhone memCustomFields"><span class="xp1">{$experience} {lang="memberexperience_experience"}</span></li>
<!-- 2 Years -->
{{elseif $months >= 24 && $months < 36}}
    <li class="ipsResponsive_hidePhone memCustomFields"><span class="xp2">{$experience} {lang="memberexperience_experience"}</span></li>
{{else}}
    <li class="ipsResponsive_hidePhone memCustomFields">{$experience} {lang="memberexperience_experience"}</li>
{{endif}}