diff --git a/config/locales/en.yml b/config/locales/en.yml
index 74811bc53..550c476aa 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -21,4 +21,6 @@ en:
   percentage: Percentage
   day: Day
   day_of_week: Day of week
-  hour_of_week: Hour of week
\ No newline at end of file
+  hour_of_week: Hour of week
+  month: Month
+  month_of_year: Month of year
\ No newline at end of file
diff --git a/lib/git_stats/git_data/activity.rb b/lib/git_stats/git_data/activity.rb
index 9396163be..c74d5c450 100644
--- a/lib/git_stats/git_data/activity.rb
+++ b/lib/git_stats/git_data/activity.rb
@@ -30,6 +30,10 @@ module GitStats
         @by_month ||= default_hash
       end
 
+      def by_month_array
+        by_month.to_key_indexed_array(min_size: 12, default: 0)
+      end
+
       def by_year
         @by_year ||= default_hash
       end
diff --git a/lib/git_stats/stats_view/charts/activity_charts.rb b/lib/git_stats/stats_view/charts/activity_charts.rb
index ffe75312b..8c4703af1 100644
--- a/lib/git_stats/stats_view/charts/activity_charts.rb
+++ b/lib/git_stats/stats_view/charts/activity_charts.rb
@@ -29,6 +29,18 @@ module GitStats
             )
           end
         end
+
+        def activity_by_month
+          Chart.new do |f|
+            f.simple_column_chart(
+                title: :commits_by_month.t,
+                y_text: :commits.t,
+                x_text: :month.t,
+                data_x: Date::ABBR_MONTHNAMES,
+                data_y: @activity.by_month_array
+            )
+          end
+        end
       end
     end
   end
diff --git a/lib/git_stats/stats_view/charts/charts.rb b/lib/git_stats/stats_view/charts/charts.rb
index 280cacc2e..f273bfcce 100644
--- a/lib/git_stats/stats_view/charts/charts.rb
+++ b/lib/git_stats/stats_view/charts/charts.rb
@@ -5,7 +5,7 @@ module GitStats
         delegate :files_by_extension, :lines_by_extension, :files_by_date, :lines_by_date,
                  :lines_added_by_author, :lines_deleted_by_author, to: :repo_charts
         delegate :by_authors_wday, to: :authors_charts
-        delegate :activity_by_hour, :activity_by_wday, to: :activity_charts
+        delegate :activity_by_hour, :activity_by_wday, :activity_by_month, to: :activity_charts
 
         attr_reader :repo
 
diff --git a/templates/activity.haml b/templates/activity.haml
index c90551c77..3b14b0f98 100644
--- a/templates/activity.haml
+++ b/templates/activity.haml
@@ -1,48 +1,80 @@
-.page-header
-  %h1.pagination-centered= :hour_of_day.t
-%table{:class => "table table-bordered table-condensed"}
-  %tr
-    %th= :hour.t
-    - (0..23).each do |h|
-      %th= h
-  %tr
-    %th= :commits.t
-    - repo.activity.by_hour_array.each do |commits|
-      %td= commits
-  %tr
-    %th= :percentage.t
-    - repo.activity.by_hour_array.each do |commits|
-      %td= (commits * 100.0 / repo.activity.by_hour_array.sum).round(2)
-= high_chart("activity_by_hour", charts.activity_by_hour)
+.tabbable.tabs-left
+  %ul.nav.nav-tabs
+    %li.active
+      %a{:href => '#hour_of_day', 'data-toogle' => 'tab'}= :hour_of_day.t
+    %li
+      %a{:href => '#day_of_week', 'data-toogle' => 'tab'}= :day_of_week.t
+    %li
+      %a{:href => '#hour_of_week', 'data-toogle' => 'tab'}= :hour_of_week.t
+    %li
+      %a{:href => '#month_of_year', 'data-toogle' => 'tab'}= :month_of_year.t
+
+  .tab-content
+    .tab-pane.active{id: 'hour_of_day'}
+      .page-header
+        %h1.pagination-centered= :hour_of_day.t
+      %table{:class => "table table-bordered table-condensed"}
+        %tr
+          %th= :hour.t
+          - (0..23).each do |h|
+            %th= h
+        %tr
+          %th= :commits.t
+          - repo.activity.by_hour_array.each do |commits|
+            %td= commits
+        %tr
+          %th= :percentage.t
+          - repo.activity.by_hour_array.each do |commits|
+            %td= (commits * 100.0 / repo.activity.by_hour_array.sum).round(2)
+      = high_chart("activity_by_hour", charts.activity_by_hour)
+
+    .tab-pane{id: 'day_of_week'}
+      .page-header
+        %h1.pagination-centered= :day_of_week.t
+      %table{:class => "table table-bordered table-condensed"}
+        %tr
+          %th= :day.t
+          - Date::ABBR_DAYNAMES.each do |d|
+            %th= d
+        %tr
+          %th= :commits.t
+          - repo.activity.by_wday_array.each do |commits|
+            %td= commits
+        %tr
+          %th= :percentage.t
+          - repo.activity.by_wday_array.each do |commits|
+            %td= (commits * 100.0 / repo.activity.by_wday_array.sum).round(2)
+      = high_chart("activity_by_wday", charts.activity_by_wday)
 
 
-.page-header
-  %h1.pagination-centered= :day_of_week.t
-%table{:class => "table table-bordered table-condensed"}
-  %tr
-    %th= :day.t
-    - Date::ABBR_DAYNAMES.each do |d|
-      %th= d
-  %tr
-    %th= :commits.t
-    - repo.activity.by_wday_array.each do |commits|
-      %td= commits
-  %tr
-    %th= :percentage.t
-    - repo.activity.by_wday_array.each do |commits|
-      %td= (commits * 100.0 / repo.activity.by_wday_array.sum).round(2)
-= high_chart("activity_by_wday", charts.activity_by_wday)
+    .tab-pane{id: 'hour_of_week'}
+      .page-header
+        %h1.pagination-centered= :hour_of_week.t
+      %table{:class => "table table-bordered table-condensed"}
+        %tr
+          %th
+          - (0..23).each do |h|
+            %th= h
+        - (0..6).each do |day|
+          %tr
+            %th= Date::ABBR_DAYNAMES[day]
+            - (0..23).each do |hour|
+              %td= repo.activity.by_wday_hour[day][hour]
 
-
-.page-header
-  %h1.pagination-centered= :hour_of_week.t
-%table{:class => "table table-bordered table-condensed"}
-  %tr
-    %th
-    - (0..23).each do |h|
-      %th= h
-  - (0..6).each do |day|
-    %tr
-      %th= Date::ABBR_DAYNAMES[day]
-      - (0..23).each do |hour|
-        %td= repo.activity.by_wday_hour[day][hour]
+    .tab-pane{id: 'month_of_year'}
+      .page-header
+        %h1.pagination-centered= :month_of_year.t
+      %table{:class => "table table-bordered table-condensed"}
+        %tr
+          %th= :day.t
+          - Date::ABBR_MONTHNAMES.each do |m|
+            %th= m
+        %tr
+          %th= :commits.t
+          - repo.activity.by_month_array.each do |commits|
+            %td= commits
+        %tr
+          %th= :percentage.t
+          - repo.activity.by_month_array.each do |commits|
+            %td= (commits * 100.0 / repo.activity.by_month_array.sum).round(2)
+      = high_chart("activity_by_month", charts.activity_by_month)
diff --git a/templates/layout.haml b/templates/layout.haml
index 314138148..a54e114e3 100644
--- a/templates/layout.haml
+++ b/templates/layout.haml
@@ -11,6 +11,14 @@
     %script{:src => "assets/jquery.min.js", :type => "text/javascript"}
     %script{:src => "assets/bootstrap/js/bootstrap.min.js", :type => "text/javascript"}
     %script{:src => "assets/highstock.js", :type => "text/javascript"}
+    %script
+      :plain
+        $(function() {
+          $('.tabbable ul a').click(function (e) {
+            e.preventDefault();
+            $(this).tab('show');
+          })
+        });
   %body
     %div.navbar.navbar-inverse.navbar-fixed-top
       %div.navbar-inner