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diff --git a/intl/icu/source/i18n/unicode/tztrans.h b/intl/icu/source/i18n/unicode/tztrans.h
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+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+* Copyright (C) 2007-2008, International Business Machines Corporation and         *
+* others. All Rights Reserved.                                                *
+*******************************************************************************
+*/
+#ifndef TZTRANS_H
+#define TZTRANS_H
+
+/**
+ * \file 
+ * \brief C++ API: Time zone transition
+ */
+
+#include "unicode/utypes.h"
+
+#if U_SHOW_CPLUSPLUS_API
+
+#if !UCONFIG_NO_FORMATTING
+
+#include "unicode/uobject.h"
+
+U_NAMESPACE_BEGIN
+
+// Forward declaration
+class TimeZoneRule;
+
+/**
+ * <code>TimeZoneTransition</code> is a class representing a time zone transition.
+ * An instance has a time of transition and rules for both before and after the transition.
+ * @stable ICU 3.8
+ */
+class U_I18N_API TimeZoneTransition : public UObject {
+public:
+    /**
+     * Constructs a <code>TimeZoneTransition</code> with the time and the rules before/after
+     * the transition.
+     * 
+     * @param time  The time of transition in milliseconds since the base time.
+     * @param from  The time zone rule used before the transition.
+     * @param to    The time zone rule used after the transition.
+     * @stable ICU 3.8
+     */
+    TimeZoneTransition(UDate time, const TimeZoneRule& from, const TimeZoneRule& to);
+
+    /**
+     * Constructs an empty <code>TimeZoneTransition</code>
+     * @stable ICU 3.8
+     */
+    TimeZoneTransition();
+
+    /**
+     * Copy constructor.
+     * @param source    The TimeZoneTransition object to be copied.
+     * @stable ICU 3.8
+     */
+    TimeZoneTransition(const TimeZoneTransition& source);
+
+    /**
+     * Destructor.
+     * @stable ICU 3.8
+     */
+    ~TimeZoneTransition();
+
+    /**
+     * Clone this TimeZoneTransition object polymorphically. The caller owns the result and
+     * should delete it when done.
+     * @return  A copy of the object.
+     * @stable ICU 3.8
+     */
+    TimeZoneTransition* clone() const;
+
+    /**
+     * Assignment operator.
+     * @param right The object to be copied.
+     * @stable ICU 3.8
+     */
+    TimeZoneTransition& operator=(const TimeZoneTransition& right);
+
+    /**
+     * Return true if the given TimeZoneTransition objects are semantically equal. Objects
+     * of different subclasses are considered unequal.
+     * @param that  The object to be compared with.
+     * @return  true if the given TimeZoneTransition objects are semantically equal.
+     * @stable ICU 3.8
+     */
+    bool operator==(const TimeZoneTransition& that) const;
+
+    /**
+     * Return true if the given TimeZoneTransition objects are semantically unequal. Objects
+     * of different subclasses are considered unequal.
+     * @param that  The object to be compared with.
+     * @return  true if the given TimeZoneTransition objects are semantically unequal.
+     * @stable ICU 3.8
+     */
+    bool operator!=(const TimeZoneTransition& that) const;
+
+    /**
+     * Returns the time of transition in milliseconds.
+     * @return The time of the transition in milliseconds since the 1970 Jan 1 epoch time.
+     * @stable ICU 3.8
+     */
+    UDate getTime(void) const;
+
+    /**
+     * Sets the time of transition in milliseconds.
+     * @param time The time of the transition in milliseconds since the 1970 Jan 1 epoch time.
+     * @stable ICU 3.8
+     */
+    void setTime(UDate time);
+
+    /**
+     * Returns the rule used before the transition.
+     * @return The time zone rule used after the transition.
+     * @stable ICU 3.8
+     */
+    const TimeZoneRule* getFrom(void) const;
+
+    /**
+     * Sets the rule used before the transition.  The caller remains
+     * responsible for deleting the <code>TimeZoneRule</code> object.
+     * @param from The time zone rule used before the transition.
+     * @stable ICU 3.8
+     */
+    void setFrom(const TimeZoneRule& from);
+
+    /**
+     * Adopts the rule used before the transition.  The caller must
+     * not delete the <code>TimeZoneRule</code> object passed in.
+     * @param from The time zone rule used before the transition.
+     * @stable ICU 3.8
+     */
+    void adoptFrom(TimeZoneRule* from);
+
+    /**
+     * Sets the rule used after the transition.  The caller remains
+     * responsible for deleting the <code>TimeZoneRule</code> object.
+     * @param to The time zone rule used after the transition.
+     * @stable ICU 3.8
+     */
+    void setTo(const TimeZoneRule& to);
+
+    /**
+     * Adopts the rule used after the transition.  The caller must
+     * not delete the <code>TimeZoneRule</code> object passed in.
+     * @param to The time zone rule used after the transition.
+     * @stable ICU 3.8
+     */
+    void adoptTo(TimeZoneRule* to);
+
+    /**
+     * Returns the rule used after the transition.
+     * @return The time zone rule used after the transition.
+     * @stable ICU 3.8
+     */
+    const TimeZoneRule* getTo(void) const;
+
+private:
+    UDate   fTime;
+    TimeZoneRule*   fFrom;
+    TimeZoneRule*   fTo;
+
+public:
+    /**
+     * Return the class ID for this class. This is useful only for comparing to
+     * a return value from getDynamicClassID(). For example:
+     * <pre>
+     * .   Base* polymorphic_pointer = createPolymorphicObject();
+     * .   if (polymorphic_pointer->getDynamicClassID() ==
+     * .       erived::getStaticClassID()) ...
+     * </pre>
+     * @return          The class ID for all objects of this class.
+     * @stable ICU 3.8
+     */
+    static UClassID U_EXPORT2 getStaticClassID(void);
+
+    /**
+     * Returns a unique class ID POLYMORPHICALLY. Pure virtual override. This
+     * method is to implement a simple version of RTTI, since not all C++
+     * compilers support genuine RTTI. Polymorphic operator==() and clone()
+     * methods call this method.
+     *
+     * @return          The class ID for this object. All objects of a
+     *                  given class have the same class ID.  Objects of
+     *                  other classes have different class IDs.
+     * @stable ICU 3.8
+     */
+    virtual UClassID getDynamicClassID(void) const override;
+};
+
+U_NAMESPACE_END
+
+#endif /* #if !UCONFIG_NO_FORMATTING */
+
+#endif /* U_SHOW_CPLUSPLUS_API */
+
+#endif // TZTRANS_H
+
+//eof