diff -r 000000000000 -r fb9019fb1bf7 src/net/fortuna/ical4j/model/property/Due.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/net/fortuna/ical4j/model/property/Due.java	Tue Feb 10 18:12:00 2015 +0100
@@ -0,0 +1,184 @@
+/**
+ * Copyright (c) 2012, Ben Fortuna
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *  o Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ *  o Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ *  o Neither the name of Ben Fortuna nor the names of any other contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package net.fortuna.ical4j.model.property;
+
+import java.text.ParseException;
+
+import net.fortuna.ical4j.model.Date;
+import net.fortuna.ical4j.model.DateTime;
+import net.fortuna.ical4j.model.ParameterList;
+import net.fortuna.ical4j.model.PropertyFactoryImpl;
+import net.fortuna.ical4j.model.TimeZone;
+import net.fortuna.ical4j.model.ValidationException;
+
+/**
+ * $Id$
+ * 
+ * Created: [Apr 6, 2004]
+ *
+ * Defines a DUE iCalendar component property.
+ * 
+ * <pre>
+ *     4.8.2.3 Date/Time Due
+ *     
+ *        Property Name: DUE
+ *     
+ *        Purpose: This property defines the date and time that a to-do is
+ *        expected to be completed.
+ *     
+ *        Value Type: The default value type is DATE-TIME. The value type can
+ *        be set to a DATE value type.
+ *     
+ *        Property Parameters: Non-standard, value data type, time zone
+ *        identifier property parameters can be specified on this property.
+ *     
+ *        Conformance: The property can be specified once in a &quot;VTODO&quot; calendar
+ *        component.
+ *     
+ *        Description: The value MUST be a date/time equal to or after the
+ *        DTSTART value, if specified.
+ *     
+ *        Format Definition: The property is defined by the following notation:
+ *     
+ *          due        = &quot;DUE&quot; dueparam&quot;:&quot; dueval CRLF
+ *     
+ *          dueparam   = *(
+ *                     ; the following are optional,
+ *                     ; but MUST NOT occur more than once
+ *     
+ *                     (&quot;;&quot; &quot;VALUE&quot; &quot;=&quot; (&quot;DATE-TIME&quot; / &quot;DATE&quot;)) /
+ *                     (&quot;;&quot; tzidparam) /
+ *     
+ *                     ; the following is optional,
+ *                     ; and MAY occur more than once
+ *     
+ *                       *(&quot;;&quot; xparam)
+ *     
+ *                     )
+ *     
+ *     
+ *     
+ *          dueval     = date-time / date
+ *          ;Value MUST match value type
+ * </pre>
+ * 
+ * @author Ben Fortuna
+ */
+public class Due extends DateProperty {
+
+    private static final long serialVersionUID = -2965312347832730406L;
+
+    /**
+     * Default constructor. The time value is initialised to the time of instantiation.
+     */
+    public Due() {
+        super(DUE, PropertyFactoryImpl.getInstance());
+        // defaults to UTC time..
+        setDate(new DateTime(true));
+    }
+
+    /**
+     * Creates a new DUE property initialised with the specified timezone.
+     * @param timezone initial timezone
+     */
+    public Due(TimeZone timezone) {
+        super(DUE, timezone, PropertyFactoryImpl.getInstance());
+    }
+
+    /**
+     * Creates a new instance initialised with the parsed value.
+     * @param value the DUE value string to parse
+     * @throws ParseException where the specified string is not a valid DUE value representation
+     */
+    public Due(final String value) throws ParseException {
+        super(DUE, PropertyFactoryImpl.getInstance());
+        setValue(value);
+    }
+
+    /**
+     * Creates a new DUE property initialised with the specified timezone and value.
+     * @param value a string representation of a DUE value
+     * @param timezone initial timezone
+     * @throws ParseException where the specified value is not a valid string
+     * representation
+     */
+    public Due(String value, TimeZone timezone) throws ParseException {
+        super(DUE, timezone, PropertyFactoryImpl.getInstance());
+        setValue(value);
+    }
+
+    /**
+     * @param aList a list of parameters for this component
+     * @param aValue a value string for this component
+     * @throws ParseException when the specified string is not a valid date/date-time representation
+     */
+    public Due(final ParameterList aList, final String aValue)
+            throws ParseException {
+        super(DUE, aList, PropertyFactoryImpl.getInstance());
+        setValue(aValue);
+    }
+
+    /**
+     * Constructor. Date or Date-Time format is determined based on the presence of a VALUE parameter.
+     * @param aDate a date
+     */
+    public Due(final Date aDate) {
+        super(DUE, PropertyFactoryImpl.getInstance());
+        setDate(aDate);
+    }
+
+    /**
+     * Constructor. Date or Date-Time format is determined based on the presence of a VALUE parameter.
+     * @param aList a list of parameters for this component
+     * @param aDate a date
+     */
+    public Due(final ParameterList aList, final Date aDate) {
+        super(DUE, aList, PropertyFactoryImpl.getInstance());
+        setDate(aDate);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public final void validate() throws ValidationException {
+        super.validate();
+
+        /*
+         * ; the following are optional, ; but MUST NOT occur more than once (";" "VALUE" "=" ("DATE-TIME" / "DATE")) /
+         * (";" tzidparam) /
+         */
+
+        /*
+         * ; the following is optional, ; and MAY occur more than once (";" xparam)
+         */
+    }
+}