index.html.erb

<% if @upcoming.present? %>
<h2 class="event-list-heading">Upcoming Events</h2>
<ul class="event-list">
<% @upcoming.each do |event| %>
  <li>
    <%= image_tag event.image.url %>
    <%= link_to "Register", new_event_registration_path(event), class: 'btn' %>
    <h3><%= link_to event.name, event_path(event) %></h3>
    <%= event.starts_at.strftime("%B %d") %> – <%= event.ends_at.strftime("%d") %> 
  </li>
<% end %>
</ul>
<% end %>

<h2 class="event-list-heading">Previous Events</h2>
<ul class="event-list">
<% @previous.each do |event| %>
  <li>
    <%= image_tag event.image.url %>
    <h3><%= link_to event.name, event_path(event) %></h3>
    <%= event.starts_at.strftime("%B %d") %> – <%= event.ends_at.strftime("%d") %> 
  </li>
<% end %>
</ul>