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[SLUG] Re: Time Pedantry
- To: slug@xxxxxxxxxxx
- Subject: [SLUG] Re: Time Pedantry
- From: Daniel Pittman <daniel@xxxxxxxxxxxx>
- Date: Wed, 07 Apr 2010 12:27:28 +1000
- Reply-to: slug@xxxxxxxxxxx
- User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux)
Jamie Wilkinson <jaq@xxxxxxxxxxxxxx> writes:
> On 1 April 2010 16:56, Daniel Pittman <daniel@xxxxxxxxxxxx> wrote:
>> Nick Andrew <nick@xxxxxxxxxxxxxxx> writes:
>>> On Thu, Apr 01, 2010 at 03:39:00PM +1100, Daniel Pittman wrote:
>>>> If it was my call, I would probably do the same thing. Way too many
>>>> developers get simple things like "this day has no 2:30AM" or "this day has
>>>> two 2:00AMs" wrong.
>>> That's why Daylight Savings is fundamentally evil. Too much time data is
>>> stored in non-canonical formats.
>> ...but the real question is if we love or hate the GMT/UTC difference, and
> *cough* :60 *cough*
Well, I am glad someone was on the ball enough to notice that. ;)
IIRC, :61 is actually a possible but extremely unlikely time value, to account
for two leap-second adjustments required in a year, but a quick look around
suggests that memory was wrong. So, :60 it is.
>> (And, finally, for anyone who really wants to despair at the whole thing,
>> I give you "The Long, Painful History of Time", which is the best write-up
>> I know of about the engineering difficulties of the topic:
> I for one am glad such pages exist. I wish the inventors of time_t had read
I wish that an awful lot of people had spent an awful lot more time looking at
what other systems around them were doing, so that I didn't have this terrible
feeling that we are finally dragging our system up to the 1980s for the second
or third time.
✣ Daniel Pittman ✉ daniel@xxxxxxxxxxxx ☎ +61 401 155 707
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