Esqueci alguns arquivos..

app/views/users/dashboard.html.haml

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+%h4.title Dashboard
+%h1.title= "Bem vindo, #{h(@current_user.display_name)}"
+
+.dashboard
+  .box
+    - last_time = nil
+    %h3 Notícias Recentes
+
+    - if @events.empty?
+      %ul
+        %li.no_itens Nenhum notícia recente
+
+    %table
+      - @news.each do |n|
+        %tr
+          %td.top.aright
+            = n.timestamp.strftime("%d de %B")
+          %td
+            = link_to(h(n.course.full_name), course_url(n.course)) + " ›"
+            = link_to(h(n.title), course_news_url(n.course, n))
+            - unless n.body.empty?
+              %p= h(n.body)
+
+  .box
+    - last_time = nil
+    %h3 Próximos Eventos
+
+    - if @events.empty?
+      %ul
+        %li.no_itens Nenhum evento próximo
+
+    %table
+      - @events.each do |n|
+        %tr
+          %td.aright.top
+            = n.time.strftime("%d de %B") #unless n.time == last_time
+            - last_time = n.time
+          %td.top
+            = n.time.strftime("%H:%M")
+          %td.top
+            = link_to(h(n.course.full_name), course_url(n.course)) + " ›"
+            = link_to(h(n.title), course_event_url(n.course, n))
+
+  .box
+    %h3 Disciplinas Matriculadas
+    %ul
+      - if @current_user.courses.empty?
+        %li.no_itens Nenhuma disciplina matriculada
+
+      - @current_user.courses.each do |course|
+        %li= link_to(h(course.full_name), course_url(course))

db/migrate/029_event_time.rb

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+class EventTime < ActiveRecord::Migration
+  def self.up
+    change_column :events, :date, :date, :null => true
+  end
+
+  def self.down
+  end
+end

public/javascripts/events.js

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+events['.div_calendario .title a:click'] = function(element, e) {
+    Effect.toggle(element.up().next(), 'blind');
+    Event.stop(e);
+}

public/javascripts/news.js

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+events['.div_news .title a:click'] = function(element, e) {
+    Effect.toggle(element.up().next(), 'blind');
+    Event.stop(e);
+}