diff --git a/navalplanner-business/src/main/java/org/navalplanner/business/orders/entities/Order.java b/navalplanner-business/src/main/java/org/navalplanner/business/orders/entities/Order.java
index e053e0172..9f0412238 100644
--- a/navalplanner-business/src/main/java/org/navalplanner/business/orders/entities/Order.java
+++ b/navalplanner-business/src/main/java/org/navalplanner/business/orders/entities/Order.java
@@ -26,6 +26,8 @@ import java.util.List;
 import java.util.Set;
 
 import org.hibernate.validator.AssertTrue;
+import org.hibernate.validator.NotNull;
+import org.navalplanner.business.calendars.entities.BaseCalendar;
 import org.navalplanner.business.planner.entities.DayAssignment;
 import org.navalplanner.business.planner.entities.ResourceAllocation;
 import org.navalplanner.business.planner.entities.Task;
@@ -62,6 +64,9 @@ public class Order extends OrderLineGroup {
 
     private Boolean dependenciesConstraintsHavePriority;
 
+    @NotNull
+    private BaseCalendar calendar;
+
     public String getResponsible() {
         return responsible;
     }
@@ -171,4 +176,12 @@ public class Order extends OrderLineGroup {
         this.dependenciesConstraintsHavePriority = dependenciesConstraintsHavePriority;
     }
 
+    public void setCalendar(BaseCalendar calendar) {
+        this.calendar = calendar;
+    }
+
+    public BaseCalendar getCalendar() {
+        return calendar;
+    }
+
 }
diff --git a/navalplanner-business/src/main/resources/org/navalplanner/business/orders/entities/Orders.hbm.xml b/navalplanner-business/src/main/resources/org/navalplanner/business/orders/entities/Orders.hbm.xml
index 038146b96..e3b5baad3 100644
--- a/navalplanner-business/src/main/resources/org/navalplanner/business/orders/entities/Orders.hbm.xml
+++ b/navalplanner-business/src/main/resources/org/navalplanner/business/orders/entities/Orders.hbm.xml
@@ -21,6 +21,7 @@
                 <param name="enumClass">org.navalplanner.business.orders.entities.SchedulingState$Type</param>
             </type>
         </property>
+
         <set name="directAdvanceAssignments" access="field" cascade="all,delete-orphan" inverse="true">
             <key column="DIRECT_ORDER_ELEMENT_ID" />
             <one-to-many class="org.navalplanner.business.advance.entities.DirectAdvanceAssignment" />
@@ -59,6 +60,10 @@
                 <property name="responsible" access="field"></property>
                 <property name="customer" access="field"></property>
                 <property name="dependenciesConstraintsHavePriority" access="field"></property>
+
+                <many-to-one name="calendar" column="BASE_CALENDAR_ID" cascade="none"
+                    class="org.navalplanner.business.calendars.entities.BaseCalendar"/>
+
             </joined-subclass>
 
         </joined-subclass>
diff --git a/navalplanner-webapp/src/main/java/org/navalplanner/web/orders/IOrderModel.java b/navalplanner-webapp/src/main/java/org/navalplanner/web/orders/IOrderModel.java
index 2362f6b7b..9780873d7 100644
--- a/navalplanner-webapp/src/main/java/org/navalplanner/web/orders/IOrderModel.java
+++ b/navalplanner-webapp/src/main/java/org/navalplanner/web/orders/IOrderModel.java
@@ -23,6 +23,7 @@ package org.navalplanner.web.orders;
 import java.util.List;
 import java.util.Map;
 
+import org.navalplanner.business.calendars.entities.BaseCalendar;
 import org.navalplanner.business.common.exceptions.ValidationException;
 import org.navalplanner.business.labels.entities.Label;
 import org.navalplanner.business.orders.entities.IOrderLineGroup;
@@ -84,4 +85,12 @@ public interface IOrderModel {
 
     void setOrder(Order order);
 
+    List<BaseCalendar> getBaseCalendars();
+
+    BaseCalendar getDefaultCalendar();
+
+    BaseCalendar getCalendar();
+
+    void setCalendar(BaseCalendar calendar);
+
 }
diff --git a/navalplanner-webapp/src/main/java/org/navalplanner/web/orders/OrderCRUDController.java b/navalplanner-webapp/src/main/java/org/navalplanner/web/orders/OrderCRUDController.java
index 973c69991..808c801ec 100644
--- a/navalplanner-webapp/src/main/java/org/navalplanner/web/orders/OrderCRUDController.java
+++ b/navalplanner-webapp/src/main/java/org/navalplanner/web/orders/OrderCRUDController.java
@@ -26,6 +26,7 @@ import java.util.List;
 
 import org.apache.commons.logging.LogFactory;
 import org.hibernate.validator.InvalidValue;
+import org.navalplanner.business.calendars.entities.BaseCalendar;
 import org.navalplanner.business.common.exceptions.ValidationException;
 import org.navalplanner.business.orders.entities.IOrderLineGroup;
 import org.navalplanner.business.orders.entities.Order;
@@ -41,6 +42,9 @@ import org.springframework.beans.factory.config.BeanDefinition;
 import org.springframework.context.annotation.Scope;
 import org.zkoss.zk.ui.Component;
 import org.zkoss.zk.ui.util.GenericForwardComposer;
+import org.zkoss.zul.Combobox;
+import org.zkoss.zul.Comboitem;
+import org.zkoss.zul.ComboitemRenderer;
 import org.zkoss.zul.Label;
 import org.zkoss.zul.Messagebox;
 import org.zkoss.zul.Tab;
@@ -99,6 +103,8 @@ public class OrderCRUDController extends GenericForwardComposer {
 
     private IOrderPlanningGate planningControllerEntryPoints;
 
+    private BaseCalendarsComboitemRenderer baseCalendarsComboitemRenderer = new BaseCalendarsComboitemRenderer();
+
     @Override
     public void doAfterCompose(Component comp) throws Exception {
         super.doAfterCompose(comp);
@@ -330,4 +336,33 @@ public class OrderCRUDController extends GenericForwardComposer {
         this.onUp = onUp;
     }
 
+    public List<BaseCalendar> getBaseCalendars() {
+        return orderModel.getBaseCalendars();
+    }
+
+    public BaseCalendarsComboitemRenderer getBaseCalendarsComboitemRenderer() {
+        return baseCalendarsComboitemRenderer;
+    }
+
+    private class BaseCalendarsComboitemRenderer implements ComboitemRenderer {
+
+        @Override
+        public void render(Comboitem item, Object data) throws Exception {
+            BaseCalendar calendar = (BaseCalendar) data;
+            item.setLabel(calendar.getName());
+            item.setValue(calendar);
+
+            BaseCalendar current = orderModel.getCalendar();
+            if ((current != null) && calendar.getId().equals(current.getId())) {
+                Combobox combobox = (Combobox) item.getParent();
+                combobox.setSelectedItem(item);
+            }
+        }
+
+    }
+
+    public void setBaseCalendar(BaseCalendar calendar) {
+        orderModel.setCalendar(calendar);
+    }
+
 }
diff --git a/navalplanner-webapp/src/main/java/org/navalplanner/web/orders/OrderModel.java b/navalplanner-webapp/src/main/java/org/navalplanner/web/orders/OrderModel.java
index 992347bf5..04e3624f6 100644
--- a/navalplanner-webapp/src/main/java/org/navalplanner/web/orders/OrderModel.java
+++ b/navalplanner-webapp/src/main/java/org/navalplanner/web/orders/OrderModel.java
@@ -35,6 +35,9 @@ import org.apache.commons.lang.Validate;
 import org.navalplanner.business.advance.entities.AdvanceMeasurement;
 import org.navalplanner.business.advance.entities.DirectAdvanceAssignment;
 import org.navalplanner.business.advance.entities.IndirectAdvanceAssignment;
+import org.navalplanner.business.calendars.daos.IBaseCalendarDAO;
+import org.navalplanner.business.calendars.entities.BaseCalendar;
+import org.navalplanner.business.common.daos.IConfigurationDAO;
 import org.navalplanner.business.common.exceptions.InstanceNotFoundException;
 import org.navalplanner.business.common.exceptions.ValidationException;
 import org.navalplanner.business.labels.daos.ILabelDAO;
@@ -103,6 +106,12 @@ public class OrderModel implements IOrderModel {
     @Autowired
     private ITaskElementDAO taskElementDAO;
 
+    @Autowired
+    private IBaseCalendarDAO baseCalendarDAO;
+
+    @Autowired
+    private IConfigurationDAO configurationDAO;
+
     @Override
     public List<Label> getLabels() {
         final List<Label> result = new ArrayList<Label>();
@@ -151,6 +160,7 @@ public class OrderModel implements IOrderModel {
         this.orderElementTreeModel = new OrderElementTreeModel(this.order);
         forceLoadAdvanceAssignmentsAndMeasurements(this.order);
         forceLoadCriterionRequirements(this.order);
+        forceLoadCalendar(this.getCalendar());
     }
 
     private void initializeCacheLabels() {
@@ -235,6 +245,7 @@ public class OrderModel implements IOrderModel {
         this.order = Order.create();
         this.orderElementTreeModel = new OrderElementTreeModel(this.order);
         this.order.setInitDate(new Date());
+        this.order.setCalendar(getDefaultCalendar());
     }
 
     @Override
@@ -351,4 +362,38 @@ public class OrderModel implements IOrderModel {
         this.order = order;
     }
 
+    @Override
+    @Transactional(readOnly = true)
+    public List<BaseCalendar> getBaseCalendars() {
+        return baseCalendarDAO.getBaseCalendars();
+    }
+
+    @Override
+    @Transactional(readOnly = true)
+    public BaseCalendar getDefaultCalendar() {
+        BaseCalendar defaultCalendar = configurationDAO.getConfiguration()
+                .getDefaultCalendar();
+        forceLoadCalendar(defaultCalendar);
+        return defaultCalendar;
+    }
+
+    private void forceLoadCalendar(BaseCalendar calendar) {
+        calendar.getName();
+    }
+
+    @Override
+    public BaseCalendar getCalendar() {
+        if (order == null) {
+            return null;
+        }
+        return order.getCalendar();
+    }
+
+    @Override
+    public void setCalendar(BaseCalendar calendar) {
+        if (order != null) {
+            order.setCalendar(calendar);
+        }
+    }
+
 }
diff --git a/navalplanner-webapp/src/main/webapp/orders/_edition.zul b/navalplanner-webapp/src/main/webapp/orders/_edition.zul
index 7f8f73eff..33b033755 100644
--- a/navalplanner-webapp/src/main/webapp/orders/_edition.zul
+++ b/navalplanner-webapp/src/main/webapp/orders/_edition.zul
@@ -83,6 +83,13 @@
                             <checkbox
                                 checked="@{controller.order.dependenciesConstraintsHavePriority}" />
                         </row>
+                        <row>
+                            <label value="${i18n:_('Calendar')}" />
+                            <combobox id="calendarCombobox"
+                                model="@{controller.baseCalendars}"
+                                itemRenderer="@{controller.baseCalendarsComboitemRenderer}"
+                                onSelect="controller.setBaseCalendar(self.selectedItem.value);" />
+                        </row>
                     </rows>
                 </grid>
             </tabpanel>