[time-nuts] June 30 2015 leap second

Henry Hallam henry at pericynthion.org
Fri Jan 9 13:59:57 EST 2015

Correct me if I'm wrong, but as I understand it the tzfile in the
tzone package is not used to update the system time - that relies on
NTP or similar.  Rather, the leap second info in the tzone files is
made available for applications to use, primarily for calculating time
differences in the past.


On Fri, Jan 9, 2015 at 6:17 AM, Tom Van Baak <tvb at leapsecond.com> wrote:
>> I couldn't help noticing that Debian just issued an update
>> to tzone, so that means Linux systems now know about the
>> leap second.
>> -Chuck Harris
> Hi Chuck,
> "Linux systems now know about the leap second" -- this is a very dangerous assumption. And one reason why leap seconds have gotten out of hand the past decade.
> Just because you observe one tz update from Debian does not imply that all "Linux systems" on planet earth (or in space) magically know about leap seconds. There must be millions (billions?) of embedded or isolated systems -- from web servers to desktops to military systems to gadgets to Raspberry Pi's to mobile phones, that have not, and will not ever receive this update.
> /tvb
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