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Re: its quiet here - test

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  Re: its quiet here - test Luuk <luuk@invalid.lan> - 2017-10-25 08:59 +0200
    Re: its quiet here - test Mark Lloyd <not@mail.invalid> - 2017-10-25 11:17 -0500
      Re: its quiet here - test "R.Wieser" <address@not.available> - 2017-10-25 18:51 +0200
        Re: its quiet here - test Mark Lloyd <not@mail.invalid> - 2017-10-26 11:47 -0500
          Re: its quiet here - test "R.Wieser" <address@not.available> - 2017-10-27 01:04 +0200
            Re: its quiet here - test Mark Lloyd <not@mail.invalid> - 2017-10-26 18:23 -0500
              Re: its quiet here - test "R.Wieser" <address@not.available> - 2017-10-27 09:25 +0200
                Re: its quiet here - test Mark Lloyd <not@mail.invalid> - 2017-10-27 12:31 -0500

#17588 — Re: its quiet here - test

what?

On 25-10-17 00:01, Mark Lloyd wrote:

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#17589

On 10/25/2017 01:59 AM, Luuk wrote:
> what?
> 
> On 25-10-17 00:01, Mark Lloyd wrote:

It was in September when I first wrote the "dtc" (days until Christmas) 
algorithm. It was expected to change the number of days at midnight, but 
it was actually changing at 1AM. The reason being the 25-hour day in 
November (National mess-with-your-clock day, where the hour 1:00:00 to 
1:59:59 AM occurs twice).

Assuming a day always has 24 hours (24 * 60 * 60 = 86400 seconds) is one 
of the common mistakes people make when working with dates.

-- 
61 days until the winter celebration (Monday December 25, 2017 12:00:00
AM for 1 day).

Mark Lloyd
http://notstupid.us/

"Heresy is only another word for freedom of thought." [Graham Greene,
1981]

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#17590

Mark,

> The reason being the 25-hour day in November (National mess-
> with-your-clock day, where the hour 1:00:00 to 1:59:59 AM occurs twice).

Isn't that day offsetted by another day somewhere in the spring, which is 
only 23 hours long ?  Did you account for that one too ? :-)

> Assuming a day always has 24 hours (24 * 60 * 60 = 86400 seconds) is one 
> of the common mistakes people make when working with dates.

The *most* common one is to try to write them yourself, instead of using the 
ones that are already available.

Just take the two date/times, have the OS convert them from local to UTC 
(with respect to its summer/winter time), and you get an *exact* answer 
back, even accounting for the leap second that happens about once every four 
years.  :-)

> 61 days until the winter celebration (Monday December 25, 2017 12:00:00 AM 
> for 1 day).

As long as you output in days, who cares about that one hour of that 25-hour 
day (and that other one of that 23-hour day) ?

Regards,
Rudy Wieser






"Mark Lloyd" <not@mail.invalid> wrote in message 
news:sO2IB.20191$fc3.527@fx35.iad...
> On 10/25/2017 01:59 AM, Luuk wrote:
>> what?
>>
>> On 25-10-17 00:01, Mark Lloyd wrote:
>
> It was in September when I first wrote the "dtc" (days until Christmas) 
> algorithm. It was expected to change the number of days at midnight, but 
> it was actually changing at 1AM. The reason being the 25-hour day in 
> November (National mess-with-your-clock day, where the hour 1:00:00 to 
> 1:59:59 AM occurs twice).
>
> Assuming a day always has 24 hours (24 * 60 * 60 = 86400 seconds) is one 
> of the common mistakes people make when working with dates.
>
> -- 
> 61 days until the winter celebration (Monday December 25, 2017 12:00:00
> AM for 1 day).
>
> Mark Lloyd
> http://notstupid.us/
>
> "Heresy is only another word for freedom of thought." [Graham Greene,
> 1981] 

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#17592

On 10/25/2017 11:51 AM, R.Wieser wrote:
> Mark,
> 
>> The reason being the 25-hour day in November (National mess-
>> with-your-clock day, where the hour 1:00:00 to 1:59:59 AM occurs twice).
> 
> Isn't that day offsetted by another day somewhere in the spring, which is
> only 23 hours long ?  Did you account for that one too ? :-)

It is in the case of finding the days until Christmas, when it's still 
February (when you have BOTH the 23-hour day and the 25-hour day during 
that interval). It does NOT offset it when your interval crosses only 
ONE of those days (in my case, only one [the 25-hour day] comes between 
September and December).


>> Assuming a day always has 24 hours (24 * 60 * 60 = 86400 seconds) is one
>> of the common mistakes people make when working with dates.
> 
> The *most* common one is to try to write them yourself, instead of using the
> ones that are already available. > Just take the two date/times, have the OS convert them from local to UTC

That is irrelevant here, since both the times I'm concerned about 
here(now and Christmas) are local times in the SAME timezone.

> (with respect to its summer/winter time), and you get an *exact* answer
> back, even accounting for the leap second that happens about once every four
> years.  :-)

In this case, I had a correct interval in SECONDS, and needed to convert 
it to days. Perhaps you could explain how you did THAT.

>> 61 days until the winter celebration (Monday December 25, 2017 12:00:00 AM
>> for 1 day).
> 
> As long as you output in days, who cares about that one hour of that 25-hour
> day (and that other one of that 23-hour day) ?
> 
> Regards,
> Rudy Wieser
> 
> 
> 
> 
> 
> 
> "Mark Lloyd" <not@mail.invalid> wrote in message
> news:sO2IB.20191$fc3.527@fx35.iad...
>> On 10/25/2017 01:59 AM, Luuk wrote:
>>> what?
>>>
>>> On 25-10-17 00:01, Mark Lloyd wrote:
>>
>> It was in September when I first wrote the "dtc" (days until Christmas)
>> algorithm. It was expected to change the number of days at midnight, but
>> it was actually changing at 1AM. The reason being the 25-hour day in
>> November (National mess-with-your-clock day, where the hour 1:00:00 to
>> 1:59:59 AM occurs twice).
>>
>> Assuming a day always has 24 hours (24 * 60 * 60 = 86400 seconds) is one
>> of the common mistakes people make when working with dates.
>>
>> -- 
>> 61 days until the winter celebration (Monday December 25, 2017 12:00:00
>> AM for 1 day).
>>
>> Mark Lloyd
>> http://notstupid.us/
>>
>> "Heresy is only another word for freedom of thought." [Graham Greene,
>> 1981]
> 
> 


-- 
60 days until the winter celebration (Monday December 25, 2017 12:00:00
AM for 1 day).

Mark Lloyd
http://notstupid.us/

"He who hears this name [God] from a Jew must inform the authorities, or
else throw sow dung at him when he sees him and chase him away." [Martin
Luther,"On the Jews and Their Lies",1543]

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#17596

Mark,

> It is in the case of finding the days until Christmas, when it's still 
> February (when you have BOTH the 23-hour day and the 25-
> hour day during that interval).

.... Or any day after chrismas but before the first summer-time day (a 
two-and-a-half month stretch.)

Regards,
Rudy Wieser

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#17597

On 10/26/2017 06:04 PM, R.Wieser wrote:
> Mark,
> 
>> It is in the case of finding the days until Christmas, when it's still
>> February (when you have BOTH the 23-hour day and the 25-
>> hour day during that interval).
> 
> .... Or any day after chrismas but before the first summer-time day (a
> two-and-a-half month stretch.)

Yes. I was using February as an example.
More generally, an EQUAL number of DST beginnings and DST endings 
between now and the event you're counting down to.

> Regards,
> Rudy Wieser
> 
> 


-- 
60 days until the winter celebration (Monday December 25, 2017 12:00:00
AM for 1 day).

Mark Lloyd
http://notstupid.us/

"He who hears this name [God] from a Jew must inform the authorities, or
else throw sow dung at him when he sees him and chase him away." [Martin
Luther,"On the Jews and Their Lies",1543]

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#17600

Mark,

> Yes. I was using February as an example.

Than its good to hear you where not forgetting about that other, as 
important day than the one with 25 hours you shone your spotlight on.

Regards,
Rudy Wieser

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#17601

On 10/27/2017 02:25 AM, R.Wieser wrote:
> Mark,
> 
>> Yes. I was using February as an example.
> 
> Than its good to hear you where not forgetting about that other, as
> important day than the one with 25 hours you shone your spotlight on.
> 
> Regards,
> Rudy Wieser

I had not mentioned the 23-hour day because it does not occur during the 
interval between NOW and Christmas.

-- 
59 days until the winter celebration (Monday December 25, 2017 12:00:00
AM for 1 day).

Mark Lloyd
http://notstupid.us/

"My mind is my own church." -- Thomas Paine

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