Calculate duration since UNIX epoch time.
SysTime value.
Duration since UNIX epoch time (1970/1/1 00:00)
import core.time : seconds; assert(UNIX_EPOCH.sinceUnixEpoch == Duration.zero); assert(SysTime(unixTimeToStdTime(1000), timeZoneUTC).sinceUnixEpoch == 1000.seconds);
See Implementation
Calculate duration since UNIX epoch time.