diff --git a/Tests/Formatter/Elements/ItemsTest.cs b/Tests/Controller/Elements/ItemsTest.cs
similarity index 99%
rename from Tests/Formatter/Elements/ItemsTest.cs
rename to Tests/Controller/Elements/ItemsTest.cs
index 4a6cce7..5375933 100755
--- a/Tests/Formatter/Elements/ItemsTest.cs
+++ b/Tests/Controller/Elements/ItemsTest.cs
@@ -25,7 +25,7 @@ using zaaReloaded2.LabModel;
 using zaaReloaded2.Formatter;
 using zaa = zaaReloaded2.Controller.Elements;
 
-namespace Tests.Formatter.Elements
+namespace Tests.Controller.Elements
 {
     [TestFixture]
     class ItemsTest
diff --git a/Tests/Controller/Elements/SelectFirstDayTest.cs b/Tests/Controller/Elements/SelectFirstDayTest.cs
new file mode 100755
index 0000000..6b06a47
--- /dev/null
+++ b/Tests/Controller/Elements/SelectFirstDayTest.cs
@@ -0,0 +1,45 @@
+/* SelectFirstDayTest.cs
+ * part of zaaReloaded2
+ * 
+ * Copyright 2015 Daniel Kraus
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using NUnit.Framework;
+using f = zaaReloaded2.Formatter;
+using zaaReloaded2.Importer.ZaaImporter;
+using zaaReloaded2.Controller.Elements;
+
+namespace Tests.Controller.Elements
+{
+    [TestFixture]
+    class SelectFirstDayTest
+    {
+        [Test]
+        public void SelectFirstDay()
+        {
+            SelectFirstDay element = new SelectFirstDay();
+            ZaaImporter importer = TestHelpers.ZaaImporterFromResource();
+            f.Formatter formatter = new f.Formatter();
+            formatter.Laboratory = importer.Laboratory;
+            element.Run(formatter);
+            Assert.AreEqual(5, formatter.WorkingTimePoints.Count);
+            DateTime firstDay = new DateTime(2015, 07, 04);
+            Assert.AreEqual(firstDay.Date, formatter.WorkingTimePoints.First().Key.Date);
+        }
+    }
+}
diff --git a/Tests/Controller/Elements/SelectLastDayTest.cs b/Tests/Controller/Elements/SelectLastDayTest.cs
new file mode 100755
index 0000000..107e863
--- /dev/null
+++ b/Tests/Controller/Elements/SelectLastDayTest.cs
@@ -0,0 +1,49 @@
+/* SelectFirstDayTest - Copy.cs
+ * part of zaaReloaded2
+ * 
+ * Copyright 2015 Daniel Kraus
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using NUnit.Framework;
+using f = zaaReloaded2.Formatter;
+using zaaReloaded2.Importer.ZaaImporter;
+using zaaReloaded2.Controller.Elements;
+
+namespace Tests.Controller.Elements
+{
+    [TestFixture]
+    class SelectLastDayTest
+    {
+        [Test]
+        public void SelectLastDay()
+        {
+            SelectLastDay element = new SelectLastDay();
+            ZaaImporter importer = TestHelpers.ZaaImporterFromResource();
+            f.Formatter formatter = new f.Formatter();
+            formatter.Laboratory = importer.Laboratory;
+            element.Run(formatter);
+            // There are two time points of 6-July-2015 in the demo output file,
+            // but since they have the exact same time stamps, they are merged
+            // into one!
+            Assert.AreEqual(1, formatter.WorkingTimePoints.Count);
+            DateTime firstDay = new DateTime(2015, 07, 06);
+            Assert.AreEqual(firstDay.Date, formatter.WorkingTimePoints.First().Key.Date);
+        }
+    }
+}
diff --git a/Tests/Tests.csproj b/Tests/Tests.csproj
index 482002d..908cf84 100755
--- a/Tests/Tests.csproj
+++ b/Tests/Tests.csproj
@@ -66,9 +66,11 @@
     </Otherwise>
   </Choose>
   <ItemGroup>
+    <Compile Include="Controller\Elements\SelectLastDayTest.cs" />
+    <Compile Include="Controller\Elements\SelectFirstDayTest.cs" />
     <Compile Include="Controller\SettingsRepositoryTest.cs" />
     <Compile Include="Thesaurus\ThesaurusTest.cs" />
-    <Compile Include="Formatter\Elements\ItemsTest.cs" />
+    <Compile Include="Controller\Elements\ItemsTest.cs" />
     <Compile Include="Formatter\FormatterTest.cs" />
     <Compile Include="Importer\ZaaImporter\LaurisItemTest.cs" />
     <Compile Include="Importer\ZaaImporter\LaurisParagraphTest.cs" />
diff --git a/zaaReloaded2/Controller/Elements/SelectFirstDay.cs b/zaaReloaded2/Controller/Elements/SelectFirstDay.cs
new file mode 100755
index 0000000..a12dd69
--- /dev/null
+++ b/zaaReloaded2/Controller/Elements/SelectFirstDay.cs
@@ -0,0 +1,41 @@
+/* SelectFirstDay.cs
+ * part of zaaReloaded2
+ * 
+ * Copyright 2015 Daniel Kraus
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace zaaReloaded2.Controller.Elements
+{
+    /// <summary>
+    /// Selects the time points of the first day in a given Formatter
+    /// object.
+    /// </summary>
+    class SelectFirstDay : ElementBase
+    {
+        public override string Label
+        {
+            get { return "Ersten Tag auswählen"; }
+        }
+
+        public override void Run(Formatter.Formatter formatter)
+        {
+            formatter.SelectFirstDay();
+        }
+    }
+}
diff --git a/zaaReloaded2/Controller/Elements/SelectLastDay.cs b/zaaReloaded2/Controller/Elements/SelectLastDay.cs
new file mode 100755
index 0000000..dd17918
--- /dev/null
+++ b/zaaReloaded2/Controller/Elements/SelectLastDay.cs
@@ -0,0 +1,42 @@
+/* SelectFirstDay - Copy.cs
+ * part of zaaReloaded2
+ * 
+ * Copyright 2015 Daniel Kraus
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace zaaReloaded2.Controller.Elements
+{
+    /// <summary>
+    /// Selects the time points of the last day in a given Formatter
+    /// object.
+    /// </summary>
+    class SelectLastDay : ElementBase
+    {
+        public override string Label
+        {
+            get { return "Letzten Tag auswählen"; }
+        }
+
+        public override void Run(Formatter.Formatter formatter)
+        {
+            formatter.SelectLastDay();
+        }
+    }
+}
diff --git a/zaaReloaded2/Formatter/Formatter.cs b/zaaReloaded2/Formatter/Formatter.cs
index cf15cc7..c82210d 100755
--- a/zaaReloaded2/Formatter/Formatter.cs
+++ b/zaaReloaded2/Formatter/Formatter.cs
@@ -67,11 +67,11 @@ namespace zaaReloaded2.Formatter
         /// <summary>
         /// Gets the current working set of TimePointFormatters.
         /// </summary>
-        public ITimePointFormatterDictionary WorkingTimePoints { get; private set; }
+        public Dictionary<DateTime, TimePointFormatter> WorkingTimePoints { get; private set; }
 
         #endregion
 
-        #region Constructor
+        #region Constructors
 
         public Formatter()
         {
@@ -95,18 +95,41 @@ namespace zaaReloaded2.Formatter
         /// current position of the cursor).</param>
         public void Run()
         {
-            WorkingTimePoints = _timePointFormatters;
             foreach (ElementBase element in Settings.Elements)
             {
                 element.Run(this);
             }
         }
 
+        /// <summary>
+        /// Selects all time points for the first day in the
+        /// laboratory.
+        /// </summary>
+        public void SelectFirstDay()
+        {
+            DateTime first = _timePointFormatters.First().Key;
+            WorkingTimePoints = _timePointFormatters
+                .Where(kv => kv.Key.Date == first.Date)
+                .ToDictionary(kv => kv.Key, kv => kv.Value);
+        }
+
+        /// <summary>
+        /// Selects all time points for the first day in the
+        /// laboratory.
+        /// </summary>
+        public void SelectLastDay()
+        {
+            DateTime last = _timePointFormatters.Last().Key;
+            WorkingTimePoints = _timePointFormatters
+                .Where(kv => kv.Key.Date == last.Date)
+                .ToDictionary(kv => kv.Key, kv => kv.Value);
+        }
+
         #endregion
 
         #region Fields
 
-        ITimePointFormatterDictionary _timePointFormatters;
+        TimePointFormatterDictionary _timePointFormatters;
         Laboratory _laboratory;
 
         #endregion
diff --git a/zaaReloaded2/Formatter/TimePointFormatterDictionary.cs b/zaaReloaded2/Formatter/TimePointFormatterDictionary.cs
index 8916da1..d561197 100755
--- a/zaaReloaded2/Formatter/TimePointFormatterDictionary.cs
+++ b/zaaReloaded2/Formatter/TimePointFormatterDictionary.cs
@@ -23,7 +23,7 @@ using System.Text;
 namespace zaaReloaded2.Formatter
 {
     public class TimePointFormatterDictionary
-        : Dictionary<DateTime, TimePointFormatter>,
+        : SortedDictionary<DateTime, TimePointFormatter>,
         ITimePointFormatterDictionary
     {
     }
diff --git a/zaaReloaded2/zaaReloaded2.csproj b/zaaReloaded2/zaaReloaded2.csproj
index 5e29f83..bf5359c 100755
--- a/zaaReloaded2/zaaReloaded2.csproj
+++ b/zaaReloaded2/zaaReloaded2.csproj
@@ -163,6 +163,8 @@
     can be found.
   -->
   <ItemGroup>
+    <Compile Include="Controller\Elements\SelectLastDay.cs" />
+    <Compile Include="Controller\Elements\SelectFirstDay.cs" />
     <Compile Include="Controller\Settings.cs" />
     <Compile Include="Controller\SettingsRepository.cs" />
     <Compile Include="Thesaurus\ThesaurusBase.cs" />