27 Time library [time]

27.10 Time zones [time.zone]

27.10.5 Class time_­zone [time.zone.timezone]

27.10.5.3 Non-member functions [time.zone.nonmembers]

bool operator==(const time_zone& x, const time_zone& y) noexcept;
Returns: x.name() == y.name().
bool operator<(const time_zone& x, const time_zone& y) noexcept;
Returns: x.name() < y.name().