template< class Duration > static std::chrono::utc_time<std::common_type_t<Duration, std::chrono::seconds>> from_sys( const std::chrono::sys_time<Duration>& t );
t to a
u that represents the same point in time.
u.time_since_epoch() - t.time_since_epoch() is equal to the number of leap seconds that was inserted between
t and 1 January 1970. If
t is the exact date of a leap second insertion, that leap second is counted as inserted.
utc_time representing the same point in time as
(public static member function)
| convert time points of one clock to another
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