diff --git a/libreplan-business/src/main/java/org/libreplan/business/orders/entities/SumChargedEffort.java b/libreplan-business/src/main/java/org/libreplan/business/orders/entities/SumChargedEffort.java
index 46a8839e9..fdd513247 100644
--- a/libreplan-business/src/main/java/org/libreplan/business/orders/entities/SumChargedEffort.java
+++ b/libreplan-business/src/main/java/org/libreplan/business/orders/entities/SumChargedEffort.java
@@ -21,6 +21,8 @@
 
 package org.libreplan.business.orders.entities;
 
+import java.util.Date;
+
 import org.libreplan.business.common.BaseEntity;
 import org.libreplan.business.workingday.EffortDuration;
 
@@ -39,6 +41,10 @@ public class SumChargedEffort extends BaseEntity {
 
     private EffortDuration indirectChargedEffort = EffortDuration.zero();
 
+    private Date firstTimesheetDate;
+
+    private Date lastTimesheetDate;
+
     protected SumChargedEffort() {}
 
     private SumChargedEffort(OrderElement orderElement) {
@@ -93,6 +99,24 @@ public class SumChargedEffort extends BaseEntity {
     public void reset() {
         directChargedEffort = EffortDuration.zero();
         indirectChargedEffort = EffortDuration.zero();
+        firstTimesheetDate = null;
+        lastTimesheetDate = null;
+    }
+
+    public Date getFirstTimesheetDate() {
+        return firstTimesheetDate;
+    }
+
+    public void setFirstTimesheetDate(Date firstTimesheetDate) {
+        this.firstTimesheetDate = firstTimesheetDate;
+    }
+
+    public Date getLastTimesheetDate() {
+        return lastTimesheetDate;
+    }
+
+    public void setLastTimesheetDate(Date lastTimesheetDate) {
+        this.lastTimesheetDate = lastTimesheetDate;
     }
 
 }
diff --git a/libreplan-business/src/main/resources/db.changelog-1.3.xml b/libreplan-business/src/main/resources/db.changelog-1.3.xml
index b4ce27ed8..3bd067ddd 100644
--- a/libreplan-business/src/main/resources/db.changelog-1.3.xml
+++ b/libreplan-business/src/main/resources/db.changelog-1.3.xml
@@ -73,4 +73,18 @@
         </update>
     </changeSet>
 
+    <changeSet id="add-columns-first-and-last-timesheet_date-to-sum_charged_effort"
+        author="mrego">
+        <comment>
+            Add columns first_timesheet_date and last_timesheet_date to
+            sum_charged_effort table
+        </comment>
+        <addColumn tableName="sum_charged_effort">
+            <column name="first_timesheet_date" type="DATETIME" />
+        </addColumn>
+        <addColumn tableName="sum_charged_effort">
+            <column name="last_timesheet_date" type="DATETIME" />
+        </addColumn>
+    </changeSet>
+
 </databaseChangeLog>
diff --git a/libreplan-business/src/main/resources/org/libreplan/business/orders/entities/Orders.hbm.xml b/libreplan-business/src/main/resources/org/libreplan/business/orders/entities/Orders.hbm.xml
index c32dada6c..fc378c102 100644
--- a/libreplan-business/src/main/resources/org/libreplan/business/orders/entities/Orders.hbm.xml
+++ b/libreplan-business/src/main/resources/org/libreplan/business/orders/entities/Orders.hbm.xml
@@ -271,6 +271,12 @@
         <property name="indirectChargedEffort" access="field"
             column="indirect_charged_effort"
             type="org.libreplan.business.workingday.hibernate.EffortDurationType" />
+
+        <property name="firstTimesheetDate" access="field"
+            column="first_timesheet_date" />
+        <property name="lastTimesheetDate" access="field"
+            column="last_timesheet_date" />
+
     </class>
 
     <class name="SumExpenses" table="sum_expenses">