Mapa de actividad con tooltip

<div class="uvq08-hm"><p class="hd"><b>Práctica de piano</b><span>Últimas 12 semanas</span></p><div class="gd show" role="group" aria-label="Práctica de piano"><button type="button" class="v0" data-m="0" aria-label="0 min" tabindex="-1"></button><button type="button" class="v2" data-m="34" aria-label="34 min" tabindex="-1"></button><button type="button" class="v2" data-m="31" aria-label="31 min" tabindex="-1"></button><button type="button" class="v1" data-m="6" aria-label="6 min" tabindex="-1"></button><button type="button" class="v3" data-m="53" aria-label="53 min" tabindex="-1"></button><button type="button" class="v4" data-m="69" aria-label="69 min" tabindex="-1"></button><button type="button" class="v2" data-m="37" aria-label="37 min" tabindex="-1"></button><button type="button" class="v1" data-m="16" aria-label="16 min" tabindex="-1"></button><button type="button" class="v2" data-m="21" aria-label="21 min" tabindex="-1"></button><button type="button" class="v3" data-m="49" 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tabindex="-1"></button><button type="button" class="v0" data-m="0" aria-label="0 min" tabindex="-1"></button><button type="button" class="v0" data-m="0" aria-label="0 min" tabindex="-1"></button><button type="button" class="v0" data-m="0" aria-label="0 min" tabindex="-1"></button><button type="button" class="v0" data-m="0" aria-label="0 min" tabindex="-1"></button><button type="button" class="v3" data-m="54" aria-label="54 min" tabindex="-1"></button><button type="button" class="v3" data-m="44" aria-label="44 min" tabindex="-1"></button><button type="button" class="v4" data-m="62" aria-label="62 min" tabindex="-1"></button><button type="button" class="v3" data-m="51" aria-label="51 min" tabindex="-1"></button><button type="button" class="v0" data-m="0" aria-label="0 min" tabindex="-1"></button><button type="button" class="v3" data-m="53" aria-label="53 min" tabindex="-1"></button><button type="button" class="v1" data-m="10" aria-label="10 min" tabindex="-1"></button><button type="button" class="v2" data-m="32" aria-label="32 min" tabindex="-1"></button><button type="button" class="v2" data-m="34" aria-label="34 min" tabindex="-1"></button><button type="button" class="v2" data-m="37" aria-label="37 min" tabindex="-1"></button><button type="button" class="v3" data-m="58" aria-label="58 min" tabindex="-1"></button><button type="button" class="v3" data-m="50" aria-label="50 min" tabindex="-1"></button><button type="button" class="v1" data-m="14" aria-label="14 min" tabindex="-1"></button><button type="button" class="v3" data-m="43" aria-label="43 min" tabindex="-1"></button><button type="button" class="v2" data-m="31" aria-label="31 min" tabindex="-1"></button><button type="button" class="v3" data-m="46" aria-label="46 min" tabindex="-1"></button><button type="button" class="v4" data-m="63" aria-label="63 min" tabindex="-1"></button><button type="button" class="v2" data-m="38" aria-label="38 min" tabindex="-1"></button><button type="button" class="v3" data-m="49" aria-label="49 min" tabindex="-1"></button><button type="button" class="v2" data-m="25" aria-label="25 min" tabindex="-1"></button><button type="button" class="v2" data-m="33" aria-label="33 min" tabindex="-1"></button><button type="button" class="v2" data-m="37" aria-label="37 min" tabindex="-1"></button><button type="button" class="v3" data-m="44" aria-label="44 min" tabindex="-1"></button><button type="button" class="v4" data-m="73" aria-label="73 min" tabindex="-1"></button><button type="button" class="v3 on" data-m="48" aria-label="48 min" tabindex="0"></button><span class="tt" aria-hidden="true"><b>48 min</b><span>dom, 25 oct</span></span></div><p class="lg" aria-hidden="true"><span>Menos</span><i class="v0"></i><i class="v1"></i><i class="v2"></i><i class="v3"></i><i class="v4"></i><span>Más</span></p></div>