app/views/monologue/sidebar/_archive.html.erb
<%= sidebar_section_for(t(".archive")) do %>
<div class="archive">
<ul>
<% DateTime.now.year.downto(@first_post_year) do |year| %>
<li>
<span class="js-year blog-year" ><%= year %></span>
<ul class="js-months" style="display:none">
<% 12.downto(1) do |month|
year_month = "#{year} #{month}"
%>
<% if @archive_posts[year_month]%>
<li>
<span class="js-month blog-month" ><%= Date::MONTHNAMES[month] %></span>
<ul class="js-posts" style="display:none">
<% @archive_posts[year_month].sort.reverse.each do |post| %>
<li><%= link_to post.title, post.full_url %></li>
<% end %>
</ul>
</li>
<% end %>
<% end %>
</ul>
</li>
<% end %>
</ul>
</div>
<% end %>