diff -r 000000000000 -r fb9019fb1bf7 src/net/fortuna/ical4j/model/TimeZone.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/net/fortuna/ical4j/model/TimeZone.java	Tue Feb 10 18:12:00 2015 +0100
@@ -0,0 +1,177 @@
+/**
+ * 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.util.Calendar;
+import java.util.Collections;
+import java.util.Date;
+import java.util.List;
+
+import net.fortuna.ical4j.model.component.Daylight;
+import net.fortuna.ical4j.model.component.Observance;
+import net.fortuna.ical4j.model.component.VTimeZone;
+import net.fortuna.ical4j.model.property.TzId;
+import net.fortuna.ical4j.model.property.TzOffsetTo;
+
+/**
+ * $Id$
+ *
+ * Created on 13/09/2005
+ *
+ * A Java timezone implementation based on an underlying VTimeZone
+ * definition.
+ * @author Ben Fortuna
+ */
+public class TimeZone extends java.util.TimeZone {
+    
+    private static final long serialVersionUID = -5620979316746547234L;
+    
+    private final VTimeZone vTimeZone;
+    private final int rawOffset;
+    
+    /**
+     * Constructs a new instance based on the specified VTimeZone.
+     * @param vTimeZone a VTIMEZONE object instance
+     */
+    public TimeZone(final VTimeZone vTimeZone) {
+        this.vTimeZone = vTimeZone;
+        final TzId tzId = (TzId) vTimeZone.getProperty(Property.TZID);
+        setID(tzId.getValue());
+        this.rawOffset = getRawOffset(vTimeZone);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public final int getOffset(final int era, final int year, final int month, final int day,
+            final int dayOfWeek, final int milliseconds) {
+        
+        final Calendar cal = Calendar.getInstance();
+        cal.set(Calendar.ERA, era);
+        cal.set(Calendar.YEAR, year);
+        cal.set(Calendar.MONTH, month);
+        cal.set(Calendar.DAY_OF_YEAR, day);
+        cal.set(Calendar.DAY_OF_WEEK, dayOfWeek);
+        cal.set(Calendar.MILLISECOND, milliseconds);
+        final Observance observance = vTimeZone.getApplicableObservance(new DateTime(cal.getTime()));
+        if (observance != null) {
+            final TzOffsetTo offset = (TzOffsetTo) observance.getProperty(Property.TZOFFSETTO);
+            return (int) offset.getOffset().getOffset();
+        }
+        return 0;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public int getOffset(long date) {
+        final Observance observance = vTimeZone.getApplicableObservance(new DateTime(date));
+        if (observance != null) {
+            final TzOffsetTo offset = (TzOffsetTo) observance.getProperty(Property.TZOFFSETTO);
+            return (int) offset.getOffset().getOffset();
+        }
+        return 0;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public final int getRawOffset() {
+        return rawOffset;
+    }
+
+    /**
+     * Determines if the specified date is in daylight time according to
+     * this timezone. This is done by finding the latest supporting
+     * observance for the specified date and identifying whether it is
+     * daylight time.
+     * @param date a date instance
+     * @return true if the specified date is in daylight time, otherwise false
+     */
+    public final boolean inDaylightTime(final Date date) {
+        final Observance observance = vTimeZone.getApplicableObservance(new DateTime(date));
+        return (observance != null && observance instanceof Daylight);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public final void setRawOffset(final int offsetMillis) {
+        throw new UnsupportedOperationException("Updates to the VTIMEZONE object must be performed directly");
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public final boolean useDaylightTime() {
+        final ComponentList daylights = vTimeZone.getObservances().getComponents(Observance.DAYLIGHT);
+        return (!daylights.isEmpty());
+    }
+
+    /**
+     * @return Returns the VTimeZone backing this instance.
+     */
+    public final VTimeZone getVTimeZone() {
+        return vTimeZone;
+    }
+
+    private static final int getRawOffset(VTimeZone vt) {
+        // per spec, rawoffset is the raw offset at the current date
+        final DateTime now = new DateTime();
+        
+        List seasonalTimes = vt.getObservances().getComponents(Observance.STANDARD);
+        // if no standard time use daylight time..
+        if (seasonalTimes.size() == 0) {
+            seasonalTimes = vt.getObservances().getComponents(Observance.DAYLIGHT);
+        }
+        Observance latestSeasonalTime = null;
+        Date latestOnset = null;
+        for (int i = 0; i < seasonalTimes.size(); i++) {
+            Observance seasonalTime = (Observance) seasonalTimes.get(i);
+            Date onset = seasonalTime.getLatestOnset(now);
+            if (onset == null) {
+                continue;
+            }
+            if (latestOnset == null || onset.after(latestOnset)) {
+                latestOnset = onset;
+                latestSeasonalTime = seasonalTime;
+            }
+        }
+        if (latestSeasonalTime != null) {
+            final TzOffsetTo offsetTo = (TzOffsetTo) latestSeasonalTime.getProperty(Property.TZOFFSETTO);
+            if (offsetTo != null) {
+                return (int) offsetTo.getOffset().getOffset();
+            }
+        }
+        return 0;
+    }
+}