diff --git a/src/main/java/info/bukova/isspst/services/requirement/ApproveException.java b/src/main/java/info/bukova/isspst/services/requirement/ApproveException.java
new file mode 100644
index 00000000..df93361c
--- /dev/null
+++ b/src/main/java/info/bukova/isspst/services/requirement/ApproveException.java
@@ -0,0 +1,24 @@
+package info.bukova.isspst.services.requirement;
+
+import info.bukova.isspst.services.IsspstException;
+
+/**
+ * @author Pepa Rokos
+ */
+public class ApproveException extends IsspstException {
+
+	/**
+	 *
+	 */
+	private static final long serialVersionUID = -3794779381621324848L;
+
+	public ApproveException() {
+		super();
+	}
+
+	public ApproveException(String message) {
+		super(message);
+		this.setReason(message);
+	}
+
+}
diff --git a/src/main/java/info/bukova/isspst/services/requirement/RequirementBaseService.java b/src/main/java/info/bukova/isspst/services/requirement/RequirementBaseService.java
index 02d320d5..27407beb 100644
--- a/src/main/java/info/bukova/isspst/services/requirement/RequirementBaseService.java
+++ b/src/main/java/info/bukova/isspst/services/requirement/RequirementBaseService.java
@@ -4,6 +4,7 @@ import info.bukova.isspst.data.RequirementBase;
 import info.bukova.isspst.data.User;
 import info.bukova.isspst.services.Service;
 
+import java.util.Date;
 import java.util.List;
 
 /**
@@ -21,6 +22,7 @@ public interface RequirementBaseService<T extends RequirementBase> extends Servi
 	public void loadType(T data);
 	public void loadWorkflow(T data);
 	public void approve(T entity);
+	public void approve(T entity, Date approveDate);
 	public boolean canApprove(T entity);
 	public List<User> getNextApprover(T entity);
 	
diff --git a/src/main/java/info/bukova/isspst/services/requirement/RequirementBaseServiceImpl.java b/src/main/java/info/bukova/isspst/services/requirement/RequirementBaseServiceImpl.java
index bc44a3f5..afef01a3 100644
--- a/src/main/java/info/bukova/isspst/services/requirement/RequirementBaseServiceImpl.java
+++ b/src/main/java/info/bukova/isspst/services/requirement/RequirementBaseServiceImpl.java
@@ -18,11 +18,6 @@ import info.bukova.isspst.services.LazyLoader;
 import info.bukova.isspst.services.settings.GlobalSettingsService;
 import info.bukova.isspst.services.users.UserService;
 import info.bukova.isspst.services.workgroups.WorkgroupService;
-
-import java.util.ArrayList;
-import java.util.Date;
-import java.util.List;
-
 import org.hibernate.LazyInitializationException;
 import org.hibernate.Query;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -30,6 +25,10 @@ import org.springframework.security.access.prepost.PostFilter;
 import org.springframework.security.access.prepost.PreAuthorize;
 import org.springframework.transaction.annotation.Transactional;
 
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+
 /**
  * @author Pepa Rokos
  * @author Franta Přibyl
@@ -211,37 +210,45 @@ public abstract class RequirementBaseServiceImpl<T extends RequirementBase> exte
 		}
 	}
 
-	protected void approve(T entity, User user) {
+	protected void approve(T entity, User user, Date approveDate) {
 		T e = (T) dao.getById(entity.getId());
-		
+
+		if (e.getReqDate().getTime() > approveDate.getTime()) {
+			throw new ApproveException("ErrApproveBeforeRequirement");
+		}
+
+		if (e.getLastApproveDate() != null && e.getLastApproveDate().getTime() > approveDate.getTime()) {
+			throw new ApproveException("ErrAppreveBeforeLastApprove");
+		}
+
 		Workflow wf = getNextWorkflow(e);
 		if (wf == null) {
 			return;
 		}
-		
+
 		Role role = wf.getRole();
 		AuthItem auth = new AuthItem();
 		auth.setApprover(user);
 		auth.setRole(role);
-		auth.setAuthDate(new Date());
-		
+		auth.setAuthDate(approveDate);
+
 		e.getAuthorization().add(auth);
-		
+
 		if (getNextWorkflow(e) == null) {
 			e.setState(RequirementState.APPROVED);
 		} else {
 			e.setState(RequirementState.PARTIALLY);
 		}
-		
+
 		super.update(e);
-		
-		if (!autoApprove(e)) {
+
+		if (!autoApprove(e, approveDate)) {
 			this.sendToApprovers(e);
-			
+
 			SettingsData settings = settingsService.getSettings();
 			MailMessage message = null;
-				
-			if (e.getOwnedBy().getEmail() != null 
+
+			if (e.getOwnedBy().getEmail() != null
 					&& !e.getOwnedBy().getEmail().isEmpty()
 					&& e.getOwnedBy().isNotify()) {
 				if (e.getState() == RequirementState.APPROVED && settings.getConfReqTemplate() != null) {
@@ -249,17 +256,21 @@ public abstract class RequirementBaseServiceImpl<T extends RequirementBase> exte
 				} else if (settings.getAuthReqTemplate() != null) {
 					message = messageBuilder.buildMessage(settings.getAuthReqTemplate(), e);
 				}
-				
+
 				if (message != null) {
 					message.setFrom(getLoggedInUser().getEmail());
 					message.setTo(e.getOwnedBy().getEmail());
-					mailer.send(message);	
+					mailer.send(message);
 				}
 			}
 		}
-		
+
 		postApprove(e);
 	}
+
+	protected void approve(T entity, User user) {
+		approve(entity, user, new Date());
+	}
 	
 	@Override
 	@Transactional
@@ -268,13 +279,21 @@ public abstract class RequirementBaseServiceImpl<T extends RequirementBase> exte
 		approve(entity, getLoggedInUser());
 	}
 
+	@Override
+	@Transactional
+	@PreAuthorize("this.canApprove(#entity)")
+	public void approve(T entity, Date approveDate) {
+		approve(entity, getLoggedInUser(), approveDate);
+	}
+
 	/**
 	 * Volá se z metody approve pro automatické schválení dalším schvalovatelem v pořadí. Metoda z báze nedělá nic.
 	 * 
 	 * @param entity Požadavek
+	 * @param approveDate
 	 * @return true pokud se provedlo automatické schválení.
 	 */
-	protected boolean autoApprove(T entity) {
+	protected boolean autoApprove(T entity, Date approveDate) {
 		return false;
 	}
 	
diff --git a/src/main/java/info/bukova/isspst/services/requirement/RequirementServiceImpl.java b/src/main/java/info/bukova/isspst/services/requirement/RequirementServiceImpl.java
index a97f078d..1e33ee45 100644
--- a/src/main/java/info/bukova/isspst/services/requirement/RequirementServiceImpl.java
+++ b/src/main/java/info/bukova/isspst/services/requirement/RequirementServiceImpl.java
@@ -10,16 +10,15 @@ import info.bukova.isspst.data.User;
 import info.bukova.isspst.data.Workflow;
 import info.bukova.isspst.services.LazyLoader;
 import info.bukova.isspst.services.invoicing.InvoicingService;
-
-import java.math.BigDecimal;
-import java.util.Date;
-import java.util.List;
-
 import org.hibernate.Hibernate;
 import org.hibernate.Query;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.transaction.annotation.Transactional;
 
+import java.math.BigDecimal;
+import java.util.Date;
+import java.util.List;
+
 /**
  * @author Pepa Rokos
  * @author Franta Přibyl
@@ -48,7 +47,7 @@ public class RequirementServiceImpl extends RequirementBaseServiceImpl<Requireme
 	}
 
 	@Override
-	protected boolean autoApprove(Requirement entity)
+	protected boolean autoApprove(Requirement entity, Date approveDate)
 	{
 		List<User> approvers = this.getNextApprover(entity);
 		Workflow nextWf = this.getNextWorkflow(entity);
@@ -61,7 +60,7 @@ public class RequirementServiceImpl extends RequirementBaseServiceImpl<Requireme
 		if ((entity.getSumTotal() != null) 
 				&& (entity.getSumTotal().compareTo(nextWf.getLimit()) == -1))
 		{
-			approve(entity, approvers.get(0));
+			approve(entity, approvers.get(0), approveDate);
 			return true;
 		}
 
diff --git a/src/main/java/info/bukova/isspst/ui/main/ApproveDialogVM.java b/src/main/java/info/bukova/isspst/ui/main/ApproveDialogVM.java
new file mode 100644
index 00000000..3afe2e8d
--- /dev/null
+++ b/src/main/java/info/bukova/isspst/ui/main/ApproveDialogVM.java
@@ -0,0 +1,60 @@
+package info.bukova.isspst.ui.main;
+
+import info.bukova.isspst.StringUtils;
+import info.bukova.isspst.data.RequirementBase;
+import info.bukova.isspst.services.requirement.ApproveException;
+import info.bukova.isspst.services.requirement.RequirementBaseService;
+import info.bukova.isspst.ui.ListViewModel;
+import org.zkoss.bind.BindUtils;
+import org.zkoss.bind.annotation.BindingParam;
+import org.zkoss.bind.annotation.Command;
+import org.zkoss.bind.annotation.ExecutionArgParam;
+import org.zkoss.bind.annotation.Init;
+import org.zkoss.zul.Messagebox;
+import org.zkoss.zul.Window;
+
+import java.util.Date;
+
+/**
+ * @author Pepa Rokos
+ */
+public class ApproveDialogVM {
+
+	private RequirementBaseService service;
+	private RequirementBase requirement;
+	private ListViewModel grid;
+	private Date approveDate;
+
+	public Date getApproveDate() {
+		return approveDate;
+	}
+
+	public void setApproveDate(Date approveDate) {
+		this.approveDate = approveDate;
+	}
+
+	@Init
+	public void init(@ExecutionArgParam("service") RequirementBaseService service,
+					 @ExecutionArgParam("requirement") RequirementBase requirement,
+					 @ExecutionArgParam("grid") ListViewModel grid) {
+		this.service = service;
+		this.requirement = requirement;
+		this.grid = grid;
+		this.approveDate = new Date();
+	}
+
+	@Command
+	public void approve(@BindingParam("window") Window window) {
+		try {
+			service.approve(requirement, approveDate);
+			BindUtils.postNotifyChange(null, null, grid, "dataBean");
+			BindUtils.postNotifyChange(null, null, grid, "canApprove");
+			BindUtils.postGlobalCommand(null, null, "reload", null);
+			window.detach();
+		} catch (ApproveException ex) {
+			Messagebox.show(StringUtils.localize(ex.getReason()), StringUtils.localize("Error"), Messagebox.OK,
+					Messagebox.ERROR);
+		}
+	}
+
+}
diff --git a/src/main/java/info/bukova/isspst/ui/requirement/RequirementSubpage.java b/src/main/java/info/bukova/isspst/ui/requirement/RequirementSubpage.java
index 42f59983..b9695f26 100644
--- a/src/main/java/info/bukova/isspst/ui/requirement/RequirementSubpage.java
+++ b/src/main/java/info/bukova/isspst/ui/requirement/RequirementSubpage.java
@@ -7,14 +7,17 @@ import info.bukova.isspst.services.users.UserService;
 import info.bukova.isspst.ui.BigDecimalConverter;
 import info.bukova.isspst.ui.ListViewModel;
 import info.bukova.isspst.ui.renderers.RequirementsItemRenderer;
-
-import java.util.List;
-
 import org.zkoss.bind.BindUtils;
 import org.zkoss.bind.annotation.Command;
 import org.zkoss.bind.annotation.Init;
 import org.zkoss.bind.annotation.NotifyChange;
+import org.zkoss.zk.ui.Executions;
 import org.zkoss.zk.ui.select.annotation.WireVariable;
+import org.zkoss.zul.Window;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
 
 public class RequirementSubpage<T extends RequirementBase> extends ListViewModel<T> {
 	
@@ -55,8 +58,12 @@ public class RequirementSubpage<T extends RequirementBase> extends ListViewModel
 	@Command
 	@NotifyChange({"dataBean", "canApprove"})
 	public void approve() {
-		this.getReqService().approve(getDataBean());
-		BindUtils.postGlobalCommand(null, null, "reload", null);
+		Map<String, Object> params = new HashMap<String, Object>();
+		params.put("service", getReqService());
+		params.put("requirement", getDataBean());
+		params.put("grid", this);
+		Window window = (Window) Executions.createComponents("/main/approveDialog.zul", null, params);
+		window.doModal();
 	}
 
 	@Override
diff --git a/src/main/webapp/WEB-INF/locales/zk-label.properties b/src/main/webapp/WEB-INF/locales/zk-label.properties
index d8dea6f6..cd200e25 100644
--- a/src/main/webapp/WEB-INF/locales/zk-label.properties
+++ b/src/main/webapp/WEB-INF/locales/zk-label.properties
@@ -42,6 +42,13 @@ RequirementItemDescription=Poznámka
 
 RequirementInvoicedAmount=Fakturovaná částka:
 
+RequirementApprove=Schválit
+RequirementApproveDialog=Schválení
+RequirementApproveDate=Datum schválení:
+RequirementApproveStatus=Stav schválení:
+
+ErrAppreveBeforeLastApprove=Datum schválení musí být pozdější než datum posledního schválení!
+ErrApproveBeforeRequirement=Datum schválení musí být pozdější než datum požadavku!
 
 AgendaMyOrders=Aktuální
 AgendaOrdersHistory=Ukončené
diff --git a/src/main/webapp/img/approve-032.png b/src/main/webapp/img/approve-032.png
new file mode 100644
index 00000000..b629aab1
Binary files /dev/null and b/src/main/webapp/img/approve-032.png differ
diff --git a/src/main/webapp/main/approveDialog.zul b/src/main/webapp/main/approveDialog.zul
new file mode 100644
index 00000000..4fa1a7f2
--- /dev/null
+++ b/src/main/webapp/main/approveDialog.zul
@@ -0,0 +1,29 @@
+<?page title="${labels.RequirementApproveDialog}" contentType="text/html;charset=UTF-8"?>
+
+<zk xmlns="http://www.zkoss.org/2005/zul"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://www.zkoss.org/2005/zul http://www.zkoss.org/2005/zul/zul.xsd">
+	<?variable-resolver class="org.zkoss.zkplus.spring.DelegatingVariableResolver"?>
+
+	<window id="approveWin" border="normal" apply="org.zkoss.bind.BindComposer"
+			viewModel="@id('vm') @init('info.bukova.isspst.ui.main.ApproveDialogVM')" width="300px" closable="true">
+		<caption
+				image="/img/approve-032.png"
+				zclass="form-caption"
+				label="${labels.RequirementApproveDialog}" />
+
+		<vbox hflex="1">
+			<hbox>
+				<label value="${labels.RequirementApproveDate}"/>
+				<datebox value="@bind(vm.approveDate)"/>
+			</hbox>
+			<separator bar="true" hflex="1"/>
+			<hbox>
+				<button image="/img/approve-016.png" label="${labels.Confirm}" onClick="@command('approve', window=approveWin)" sclass="nicebutton"/>
+				<button image="~./zul/img/misc/drag-disallow.png" label="${labels.ButtonStorno}" onClick="approveWin.detach()" sclass="nicebutton"/>
+			</hbox>
+		</vbox>
+
+	</window>
+
+</zk>
\ No newline at end of file
diff --git a/src/main/webapp/main/approveStatus.zul b/src/main/webapp/main/approveStatus.zul
index 8776a7c9..feff177d 100644
--- a/src/main/webapp/main/approveStatus.zul
+++ b/src/main/webapp/main/approveStatus.zul
@@ -1,8 +1,10 @@
 <?page title="approve status" contentType="text/html;charset=UTF-8"?>
-<zk>
+<zk xmlns="http://www.zkoss.org/2005/zul"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://www.zkoss.org/2005/zul http://www.zkoss.org/2005/zul/zul.xsd">
 
-	<label value="Stav schválení: "/>
-	<button label="Schválit" 
+	<label value="${labels.RequirementApproveStatus}"/>
+	<button label="${labels.RequirementApprove}"
 		image="/img/approve-016.png"
 		onClick="@command('approve')" 
 		disabled="@load(not vm.canApprove)"