diff --git a/activesupport/CHANGELOG b/activesupport/CHANGELOG
index 6c1e6185af09..043b55077aa9 100644
--- a/activesupport/CHANGELOG
+++ b/activesupport/CHANGELOG
@@ -1,5 +1,7 @@
 *Rails 3.2.0 (unreleased)*
 
+* Added Time#whole_day/week/quarter/year as a way of generating ranges (example: Event.where(created_at: Time.now.whole_week)) [DHH]
+
 * Added instance_accessor: false as an option to Class#cattr_accessor and friends [DHH]
 
 * Removed ActiveSupport::SecureRandom in favour of SecureRandom from the standard library [Jon Leighton]
diff --git a/activesupport/lib/active_support/core_ext/time/calculations.rb b/activesupport/lib/active_support/core_ext/time/calculations.rb
index 00fda2b37045..54e16a9fb748 100644
--- a/activesupport/lib/active_support/core_ext/time/calculations.rb
+++ b/activesupport/lib/active_support/core_ext/time/calculations.rb
@@ -226,7 +226,7 @@ def end_of_quarter
   end
   alias :at_end_of_quarter :end_of_quarter
 
-  # Returns  a new Time representing the start of the year (1st of january, 0:00)
+  # Returns a new Time representing the start of the year (1st of january, 0:00)
   def beginning_of_year
     change(:month => 1, :day => 1, :hour => 0)
   end
@@ -248,6 +248,31 @@ def tomorrow
     advance(:days => 1)
   end
 
+  # Returns a Range representing the whole day of the current time.
+  def whole_day
+    beginning_of_day..end_of_day
+  end
+
+  # Returns a Range representing the whole week of the current time.
+  def whole_week
+    beginning_of_week..end_of_week
+  end
+
+  # Returns a Range representing the whole month of the current time.
+  def whole_month
+    beginning_of_month..end_of_month
+  end
+
+  # Returns a Range representing the whole quarter of the current time.
+  def whole_quarter
+    beginning_of_quarter..end_of_quarter
+  end
+
+  # Returns a Range representing the whole year of the current time.
+  def whole_year
+    beginning_of_year..end_of_year
+  end
+
   def plus_with_duration(other) #:nodoc:
     if ActiveSupport::Duration === other
       other.since(self)
diff --git a/activesupport/test/core_ext/time_ext_test.rb b/activesupport/test/core_ext/time_ext_test.rb
index 44e02109b19b..989a598ae066 100644
--- a/activesupport/test/core_ext/time_ext_test.rb
+++ b/activesupport/test/core_ext/time_ext_test.rb
@@ -767,6 +767,26 @@ def test_case_equality
     assert_equal false, Time === DateTime.civil(2000)
   end
 
+  def test_whole_day
+    assert_equal Time.local(2011,6,7,0,0,0)..Time.local(2011,6,7,23,59,59,999999.999), Time.local(2011,6,7,10,10,10).whole_day
+  end
+
+  def test_whole_week
+    assert_equal Time.local(2011,6,6,0,0,0)..Time.local(2011,6,12,23,59,59,999999.999), Time.local(2011,6,7,10,10,10).whole_week
+  end
+
+  def test_whole_month
+    assert_equal Time.local(2011,6,1,0,0,0)..Time.local(2011,6,30,23,59,59,999999.999), Time.local(2011,6,7,10,10,10).whole_month
+  end
+
+  def test_whole_quarter
+    assert_equal Time.local(2011,4,1,0,0,0)..Time.local(2011,6,30,23,59,59,999999.999), Time.local(2011,6,7,10,10,10).whole_quarter
+  end
+
+  def test_whole_year
+    assert_equal Time.local(2011,1,1,0,0,0)..Time.local(2011,12,31,23,59,59,999999.999), Time.local(2011,6,7,10,10,10).whole_year
+  end
+
   protected
     def with_env_tz(new_tz = 'US/Eastern')
       old_tz, ENV['TZ'] = ENV['TZ'], new_tz