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diff --git a/boost/chrono/io/timezone.hpp b/boost/chrono/io/timezone.hpp
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+//  (C) Copyright Howard Hinnant
+//  (C) Copyright 2010-2011 Vicente J. Botet Escriba
+//  Use, modification and distribution are subject to the Boost Software License,
+//  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt).
+//
+// This code was adapted by Vicente from Howard Hinnant's experimental work
+// on chrono i/o to Boost
+
+#ifndef BOOST_CHRONO_IO_TIMEZONE_HPP
+#define BOOST_CHRONO_IO_TIMEZONE_HPP
+#include <boost/detail/scoped_enum_emulation.hpp>
+
+namespace boost
+{
+  namespace chrono
+  {
+    /**
+     * Scoped enumeration emulation stating whether the time_point for system_clock I/O is UTC or local.
+     */
+    BOOST_SCOPED_ENUM_DECLARE_BEGIN(timezone)
+          {
+            utc, local
+          }
+    BOOST_SCOPED_ENUM_DECLARE_END(timezone)
+
+  } // chrono
+} // boost
+
+#endif  // header