29 Time library [time]

29.11 Time zones [time.zone]

29.11.6 Class template zoned_­traits [time.zone.zonedtraits]

namespace std::chrono { template<class T> struct zoned_traits {}; }
zoned_­traits provides a means for customizing the behavior of zoned_­time<Duration, TimeZonePtr> for the zoned_­time default constructor, and constructors taking string_­view.
A specialization for const time_­zone* is provided by the implementation: namespace std::chrono { template<> struct zoned_traits<const time_zone*> { static const time_zone* default_zone(); static const time_zone* locate_zone(string_view name); }; }
static const time_zone* default_zone();
Returns: std​::​chrono​::​locate_­zone("UTC").
static const time_zone* locate_zone(string_view name);
Returns: std​::​chrono​::​locate_­zone(name).