<% (1..12).to_a.each_slice(3) do |months| %>
<% months.each do |month_number| %>
<% if past?(year, month_number) && points_exist?(year, month_number, current_user) %>
<%= link_to Date::ABBR_MONTHNAMES[month_number], map_url(timespan(month_number, year)), class: 'btn btn-default' %>
<% else %>
<%= Date::ABBR_MONTHNAMES[month_number] %>
<% end %>
<% end %>
<% end %>