Re:The Unix timestamp will begin with 16 this Sunday
by bitpow on Saturday September 12, 2020 @03:51PM
(#24455032)
Is this accurate though? Isn’t the number of seconds since 1970 absolute, and it’s up to the library generating the Gregorian date to take into account leap seconds?
I suppose if these libraries are not taking into account leap seconds, then the actual rollover will be a few seconds earlier (or later?) than what we think.
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Re:The Unix timestamp will begin with 16 this Sunday
by fanf2 on Saturday September 12, 2020 @04:28PM
(#24455345)
See the definition of seconds since the epoch at https://pubs.opengroup.org/onlinepubs/9699919799.2018edition...
tm_sec + tm_min*60 + tm_hour*3600 + tm_yday*86400 +
(tm_year-70)*31536000 + ((tm_year-69)/4)*86400 -
((tm_year-1)/100)*86400 + ((tm_year+299)/400)*86400
Re:The Unix timestamp will begin with 16 this Sunday
by JdeBP on Sunday September 13, 2020 @03:34AM
(#24459134)
Your time_t isn't the true number of SI seconds since the Epoch. It's that number, mucked around 27 times so far. Instead of leaving their kernels to count one tick per SI second (ignoring oscillator drift) many people slew, step, or smear their seconds count every time that there is a leap second.
Go and read about "right" versus "posix" timezones.