namespace std::chrono {
  class time_zone_link {
  public:
    time_zone_link(time_zone_link&&)            = default;
    time_zone_link& operator=(time_zone_link&&) = default;
    
    string_view name()   const noexcept;
    string_view target() const noexcept;
  };
}
A 
time_zone_link specifies an alternative name for a 
time_zone.time_zone_links are constructed when the time zone database is initialized
.