[SlugLUG] Daylight Savings Time

[Karl Young]

Thinking about date and time oddities, and having to dredge up the date -r for the 
BSD-like Mac reminds me of the next impending Doomsday, Mon Jan 18 19:14:07 PST 2038,
when "seconds since the epoch" overflows.

I'd like to take this opportunity to coin the term "S2G bug."

I first became aware of it in about 1996, when I had a customer who had to certify
an application out to 2070 or so.  He tried setting the system date out there and 
it went to a wayback date.

At the time the developers I was working with said that by 2038 we would be using
64-bit ints, and could track time in Mitcorseconds for nearly 300K years.

Another suggested that by 2038 we may not be using years, seconds, or bits.

-karl


Peter Belew(abcruzww at gmail.com)@2007.02.22 12:22:42 -0800:
> If you haven't noticed, Daylight Savings Time starts early and ends
> late this year - starting on March 11.
> 
> Linux users should have already had an update which fixes this (via
> your distro's favorite update program). To test it, do
> 
>   date -d '27 March'
> 
> You should see
> 
>   Tue Mar 27 00:00:00 PDT 2007
> 
> If you see 'PST', you should update your system.
> 
> (I already posted this on the SMAUG list)
> 
> Actually Daylight Savings time begins at this time:
> 
> date -d 'March 11 03:00:00'
> Sun Mar 11 03:00:00 PDT 2007
> 
> Times between 02:00:00 and 02:59:59 are invalid on that date - as soon
> as the time increments to 2 AM, it "springs forward" to 3 AM.
> 
> MS Windows updates will have fixed this recently, too.
> 
> - Peter
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