And What About the Internet Date and Time?

Bob Sneidar bobs at twft.com
Fri Aug 19 11:18:41 CDT 2011


This is true. I tested this myself, and that is why I accessed the system time zone (but not the time) to make the adjustment, and have an argument in my function where you can tell the function if you want to adjust for the time zone or no. 

I think I will update my own function at some point to take advantage of the NIST site, but it looks like someone has done that already. 

Bob


On Aug 18, 2011, at 2:57 PM, Peter M. Brigham, MD wrote:

> On Aug 18, 2011, at 4:03 PM, Gregory Lypny wrote:
> 
>> Hello again everyone,
>> 
>> Okay, please don’t hate me.  I'm still trying to nail down a reasonably accurate system-independent date and time stamp to use in my student client app that will submit and retrieve data from my Mac.  I will post a modest enhancement to Stephan Barncard’s excellent returnNISTime function shortly.
>> 
>> My question is, How does LiveCode know the local computer’s time zone when we ask for the date in the Internet Date format?  My guess is that the computer’s owner has to have set it.  And if the person is on the move, it may be incorrect even if it was set at their primary location.  Yes?
> 
> AFAIK, It doesn't matter. You can just fetch the universal (GMT) time and convert it to seconds. This will be independent of the time zone the user sets. If someone in Australia submits data one second after someone in New York, the timestamp will be 1313704257 in the first case and 1313704258 in the second case. Ignore the time zone altogether. (Someone correct me if I'm wrong, but I just tested this, changing my time zone in my system settings in between trials, and indeed, the two results were within 30 seconds.)
> 
> -- Peter
> 
> Peter M. Brigham
> pmbrig at gmail.com
> http://home.comcast.net/~pmbrig
> 
> 
> 
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