diff --git a/org.adempiere.base/src/org/compiere/print/DataEngine.java b/org.adempiere.base/src/org/compiere/print/DataEngine.java
index 669ab197ec..cf40731ce9 100644
--- a/org.adempiere.base/src/org/compiere/print/DataEngine.java
+++ b/org.adempiere.base/src/org/compiere/print/DataEngine.java
@@ -970,9 +970,9 @@ public class DataEngine
 									else if (m_group.isFunctionColumn(pdc.getAD_PrintFormatItem_ID(), functions[f]))
 									{
 										pd.addNode(new PrintDataElement(pdc.getAD_PrintFormatItem_ID(), pdc.getColumnName(),
-											m_group.getValue(group_pdc.getAD_PrintFormatItem_ID(), 
-												pdc.getAD_PrintFormatItem_ID(), functions[f]), 
-											PrintDataFunction.getFunctionDisplayType(functions[f], pdc.getDisplayType()), 
+												m_group.getValue(group_pdc.getAD_PrintFormatItem_ID(), 
+														pdc.getAD_PrintFormatItem_ID(), functions[f]), 
+												PrintDataFunction.getFunctionDisplayType(functions[f], pdc.getDisplayType()), 
 												false, pdc.isPageBreak(), pdc.getFormatPattern()));
 									}
 								}	//	 for all columns
@@ -1191,9 +1191,9 @@ public class DataEngine
 							else if (m_group.isFunctionColumn(pdc.getAD_PrintFormatItem_ID(), functions[f]))
 							{
 								pd.addNode(new PrintDataElement(pdc.getAD_PrintFormatItem_ID(), pdc.getColumnName(),
-									m_group.getValue(group_pdc.getAD_PrintFormatItem_ID(), 
-										pdc.getAD_PrintFormatItem_ID(), functions[f]),
-									PrintDataFunction.getFunctionDisplayType(functions[f],
+										m_group.getValue(group_pdc.getAD_PrintFormatItem_ID(), 
+												pdc.getAD_PrintFormatItem_ID(), functions[f]),	
+										PrintDataFunction.getFunctionDisplayType(functions[f],
 											pdc.getDisplayType()),pdc.getFormatPattern()));
 							}
 						}
@@ -1228,9 +1228,9 @@ public class DataEngine
 					else if (m_group.isFunctionColumn(pdc.getAD_PrintFormatItem_ID(), functions[f]))
 					{
 						pd.addNode(new PrintDataElement(pdc.getAD_PrintFormatItem_ID(), pdc.getColumnName(),
-							m_group.getValue(PrintDataGroup.TOTAL, 
-								pdc.getAD_PrintFormatItem_ID(), functions[f]),
-							PrintDataFunction.getFunctionDisplayType(functions[f], pdc.getDisplayType()), pdc.getFormatPattern()));
+								m_group.getValue(PrintDataGroup.TOTAL, 
+										pdc.getAD_PrintFormatItem_ID(), functions[f]), 
+								PrintDataFunction.getFunctionDisplayType(functions[f], pdc.getDisplayType()), pdc.getFormatPattern()));
 					}
 				}	//	for all columns
 			}	//	for all functions
diff --git a/org.adempiere.base/src/org/compiere/print/PrintDataElement.java b/org.adempiere.base/src/org/compiere/print/PrintDataElement.java
index 6a2f83c244..3c996567be 100644
--- a/org.adempiere.base/src/org/compiere/print/PrintDataElement.java
+++ b/org.adempiere.base/src/org/compiere/print/PrintDataElement.java
@@ -164,7 +164,7 @@ public class PrintDataElement implements Serializable
 	 * 	Get Function Value
 	 * 	@return length or numeric value
 	 */
-	public BigDecimal getFunctionValue()
+	public Serializable getFunctionValue()
 	{
 		if (m_value == null)
 			return Env.ZERO;
@@ -184,6 +184,10 @@ public class PrintDataElement implements Serializable
 				return Env.ZERO;
 		}
 
+		// Timestamp
+		if (m_value instanceof Timestamp)
+			return m_value;
+		
 		//	Return Length
 		String s = m_value.toString();
 		return new BigDecimal(s.length());
diff --git a/org.adempiere.base/src/org/compiere/print/PrintDataFunction.java b/org.adempiere.base/src/org/compiere/print/PrintDataFunction.java
index 8e95b68109..8f4fc3d85a 100644
--- a/org.adempiere.base/src/org/compiere/print/PrintDataFunction.java
+++ b/org.adempiere.base/src/org/compiere/print/PrintDataFunction.java
@@ -16,8 +16,10 @@
  *****************************************************************************/
 package org.compiere.print;
 
+import java.io.Serializable;
 import java.math.BigDecimal;
 import java.math.RoundingMode;
+import java.sql.Timestamp;
 
 import org.compiere.util.DisplayType;
 import org.compiere.util.Env;
@@ -51,6 +53,10 @@ public class PrintDataFunction
 	private BigDecimal	m_min = null;
 	/** Maximum				*/
 	private BigDecimal	m_max = null;
+	/** Minimum Date		*/
+	private Timestamp	m_minDate = null;
+	/** Maximum	Date		*/
+	private Timestamp	m_maxDate = null;
 	/** Sum of Squares		*/
 	private BigDecimal	m_sumSquare = Env.ZERO;
 
@@ -82,26 +88,38 @@ public class PrintDataFunction
 
 	/**
 	 * 	Add Value to Counter
-	 * 	@param bd data
+	 * 	@param s data
 	 */
-	public void addValue (BigDecimal bd)
+	public void addValue (Serializable s)
 	{
-		if (bd != null)
+		if (s != null)
 		{
-			//	Sum
-			m_sum = m_sum.add(bd);
 			//	Count
 			m_count++;
-			//	Min
-			if (m_min == null)
-				m_min = bd;
-			m_min = m_min.min(bd);
-			//	Max
-			if (m_max == null)
-				m_max = bd;
-			m_max = m_max.max(bd);
-			//	Sum of Squares
-			m_sumSquare = m_sumSquare.add (bd.multiply(bd));
+			if(s instanceof BigDecimal) {
+				BigDecimal bdVaue =(BigDecimal)s;
+				//	Sum
+				m_sum = m_sum.add(bdVaue);
+				//	Min
+				if (m_min == null)
+					m_min = bdVaue;
+				m_min = m_min.min(bdVaue);
+				//	Max
+				if (m_max == null)
+					m_max = bdVaue;
+				m_max = m_max.max(bdVaue);
+				//	Sum of Squares
+				m_sumSquare = m_sumSquare.add (bdVaue.multiply(bdVaue));
+			}
+			else if(s instanceof Timestamp) {
+				Timestamp t = (Timestamp) s;
+				//	Min Timestamp
+				if ((m_minDate == null) || (m_minDate.after(t)))
+					m_minDate = t;
+				//	Max Timestamp
+				if ((m_maxDate == null) || (m_maxDate.before(t)))
+					m_maxDate = t;
+			}
 		}
 		m_totalCount++;
 	}	//	addValue
@@ -111,16 +129,24 @@ public class PrintDataFunction
 	 *  @param function function
 	 *  @return function value
 	 */
-	public BigDecimal getValue(char function)
+	public Serializable getValue(char function)
 	{
 		//	Sum
 		if (function == F_SUM)
 			return m_sum;
 		//	Min/Max
-		if (function == F_MIN)
-			return m_min;
-		if (function == F_MAX)
-			return m_max;
+		if (function == F_MIN) {
+			if(m_minDate != null)
+				return m_minDate;
+			else
+				return m_min;
+		}
+		if (function == F_MAX) {
+			if(m_maxDate != null)
+				return m_maxDate;
+			else
+				return m_max;
+		}
 		//	Count
 		BigDecimal count = new BigDecimal(m_count);
 		if (function == F_COUNT)
@@ -166,6 +192,8 @@ public class PrintDataFunction
 		m_sumSquare = Env.ZERO;
 		m_min = null;
 		m_max = null;
+		m_minDate = null;
+		m_maxDate = null;
 	}	//	reset
 
 	/**
diff --git a/org.adempiere.base/src/org/compiere/print/PrintDataGroup.java b/org.adempiere.base/src/org/compiere/print/PrintDataGroup.java
index 695ac59127..9a098470fa 100644
--- a/org.adempiere.base/src/org/compiere/print/PrintDataGroup.java
+++ b/org.adempiere.base/src/org/compiere/print/PrintDataGroup.java
@@ -16,7 +16,7 @@
  *****************************************************************************/
 package org.compiere.print;
 
-import java.math.BigDecimal;
+import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.Iterator;
@@ -201,7 +201,7 @@ public class PrintDataGroup
 	 * 	@param functionColumnId function column
 	 * 	@param functionValue value
 	 */
-	public void addValue (int functionColumnId, BigDecimal functionValue)
+	public void addValue (int functionColumnId, Serializable functionValue)
 	{
 		if (!isFunctionColumn(functionColumnId))
 			return;
@@ -225,7 +225,7 @@ public class PrintDataGroup
 	 * 	@param function function
 	 * 	@return value
 	 */
-	public BigDecimal getValue (int groupId, int functionColumnId,
+	public Serializable getValue (int groupId, int functionColumnId,
 		char function)
 	{
 		String key = groupId + DELIMITER + functionColumnId;