app/views/time_slots/_hour_header.html.erb
<li style="width: <%= 100/@hours_per_day.to_f %>%; left: <%= hour_header_counter*100/@hours_per_day.to_f %>%;" >
<div class="hours" >
<div class="center_container">
<div class="center_content">
<%= Time.now.change(hour: hour_header).strftime("%l%p") %>
</div>
</div>
</div>
<%= render partial: "time_slots/minutes", collection: (0...(@blocks_per_hour-1)).to_a %>
</li>