diff -r 000000000000 -r fb9019fb1bf7 src/net/fortuna/ical4j/model/Iso8601.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/net/fortuna/ical4j/model/Iso8601.java	Tue Feb 10 18:12:00 2015 +0100
@@ -0,0 +1,155 @@
+/**
+ * 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;
+
+import java.text.DateFormat;
+import java.util.Date;
+
+import net.fortuna.ical4j.util.CompatibilityHints;
+import net.fortuna.ical4j.util.Dates;
+import net.fortuna.ical4j.util.TimeZones;
+
+/**
+ * $Id$
+ *
+ * Created on 30/06/2005
+ *
+ * Base class for date and time representations as defined
+ * by the ISO 8601 standard. Sub-classes must ensure that either the correct
+ * precision is used in constructor arguments, or that <code>Object.equals()</code>
+ * is overridden to ensure equality checking is consistent with the type.
+ * @author Ben Fortuna
+ */
+public abstract class Iso8601 extends Date {
+    
+    /**
+     * 
+     */
+    private static final long serialVersionUID = -4290728005713946811L;
+
+    private DateFormat format;
+    
+    private DateFormat gmtFormat;
+    
+    private int precision;
+
+    /**
+     * @param time a time value in milliseconds
+     * @param pattern the formatting pattern to apply
+     * @param precision the precision to apply
+     * @param tz the timezone for the instance
+     * @see Dates#PRECISION_DAY
+     * @see Dates#PRECISION_SECOND
+     */
+    public Iso8601(final long time, final String pattern, final int precision, java.util.TimeZone tz) {
+        super(Dates.round(time, precision, tz)); //, TimeZone.getTimeZone(TimeZones.GMT_ID)));
+//        format = new SimpleDateFormat(pattern);
+        format = CalendarDateFormatFactory.getInstance(pattern);
+        format.setTimeZone(tz);
+        format.setLenient(CompatibilityHints.isHintEnabled(CompatibilityHints.KEY_RELAXED_PARSING));
+        // use GMT timezone to avoid daylight savings rules affecting floating
+        // time values..
+//        gmtFormat = new SimpleDateFormat(pattern);
+//        gmtFormat.setTimeZone(TimeZone.getTimeZone(TimeZones.GMT_ID));
+        this.precision = precision;
+    }
+    
+    /**
+     * @param pattern the formatting pattern to apply
+     * @param precision the precision to apply
+     * @param tz the timezone for the instance
+     * @see Dates#PRECISION_DAY
+     * @see Dates#PRECISION_SECOND
+     */
+    public Iso8601(final String pattern, final int precision, java.util.TimeZone tz) {
+        this(Dates.getCurrentTimeRounded(), pattern, precision, tz);
+    }
+
+    /**
+     * @param time a time value as a date
+     * @param pattern the formatting pattern to apply
+     * @param precision the precision to apply
+     * @param tz the timezone for the instance
+     * @see Dates#PRECISION_DAY
+     * @see Dates#PRECISION_SECOND
+     */
+    public Iso8601(final Date time, final String pattern, final int precision, java.util.TimeZone tz) {
+        this(time.getTime(), pattern, precision, tz);
+    }
+    
+    /**
+     * {@inheritDoc}
+     */
+    public String toString() {
+        // if time is floating avoid daylight saving rules when generating
+        // string representation of date..
+        if (!(format.getTimeZone() instanceof TimeZone)) {
+            if (gmtFormat == null) {
+                gmtFormat = (DateFormat) format.clone();
+                gmtFormat.setTimeZone(TimeZone.getTimeZone(TimeZones.GMT_ID));
+            }
+            if (format.getTimeZone().inDaylightTime(this)
+                    && format.getTimeZone().inDaylightTime(new Date(getTime() - 1))) {
+                
+                return gmtFormat.format(new Date(getTime()
+                        + format.getTimeZone().getRawOffset()
+                        + format.getTimeZone().getDSTSavings()));
+//                return format.format(new Date(getTime() - format.getTimeZone().getDSTSavings()));
+            }
+//            return gmtFormat.format(new Date(getTime() + format.getTimeZone().getOffset(getTime())));
+            return gmtFormat.format(new Date(getTime() + format.getTimeZone().getRawOffset()));
+        }
+        return format.format(this);
+    }
+
+    /**
+     * @return Returns the format.
+     */
+    protected final DateFormat getFormat() {
+        return format;
+    }
+    
+    /**
+     * {@inheritDoc}
+     */
+    public void setTime(final long time) {
+        // need to check for null format due to Android java.util.Date(long) constructor
+        // calling this method..
+        if (format != null) {
+            super.setTime(Dates.round(time, precision, format.getTimeZone()));
+        }
+        else {
+            // XXX: what do we do here??
+            super.setTime(time);
+        }
+    }
+}