[time.zone.overview]

# 30 Time library [[time]](./#time)

## 30.11 Time zones [[time.zone]](time.zone#overview)

### 30.11.5 Class time_zone [[time.zone.timezone]](time.zone.timezone#time.zone.overview)

#### 30.11.5.1 Overview [time.zone.overview]

namespace std::chrono {class time_zone {public: time_zone(time_zone&&) = default;
 time_zone& operator=(time_zone&&) = default; // unspecified additional constructors string_view name() const noexcept; template<class Duration> sys_info get_info(const sys_time<Duration>& st) const; template<class Duration> local_info get_info(const local_time<Duration>& tp) const; template<class Duration> sys_time<common_type_t<Duration, seconds>> to_sys(const local_time<Duration>& tp) const; template<class Duration> sys_time<common_type_t<Duration, seconds>> to_sys(const local_time<Duration>& tp, choose z) const; template<class Duration> local_time<common_type_t<Duration, seconds>> to_local(const sys_time<Duration>& tp) const; };}

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/time.tex#L9425)

A time_zone represents all time zone transitions
for a specific geographic area[.](#1.sentence-1)

time_zone construction is unspecified,
and performed as part of database initialization[.](#1.sentence-2)

[*Note [1](#note-1)*:

const time_zone objects can be accessed
via functions such as locate_zone[.](#1.sentence-3)

— *end note*]