const std::string &get_name() const { return name; }
const TimeDelta &get_offset() const { return offset; }
static const TimeZone &utc();
static const TimeZone &local();
const std::string &get_name() const { return name; }
const TimeDelta &get_offset() const { return offset; }
static const TimeZone &utc();
static const TimeZone &local();