Date and time format question

[Bob Sneidar]

Meh never mind overthinking it. Both ways work. 

Bob S


> On Jul 29, 2024, at 3:30 PM, Bob Sneidar <bobsneidar at iotecdigital.com> wrote:
> 
> Actually it’s possible in some whacko time zones to get a rounding error by dividing first so:
> 
> …
>> put (tOffset *60 *60) /100 into tOffset
> …
> 
> Bob S
> 
> 
>> On Jul 29, 2024, at 3:14 PM, Bob Sneidar via use-livecode <use-livecode at lists.runrev.com> wrote:
>> 
>> Simpler than that: 
>> 
>> on mouseUp
>>  put "Mon, 29 Jul 2024 15:49:52 -0400" into tDateTime
>>  put word -1 of tDateTime into tOffset
>>  -- delete last word of tDateTime
>>  convert tDateTime to seconds
>>  put (tOffset / 100) *60 *60 into tOffset
>>  add tOffset to tDateTime
>>  convert tDateTime to  long date and  long time
>>  put tDateTime
>> end mouseUp
>> 
>> Bob S
>> 
>> 
>>> On Jul 29, 2024, at 3:02 PM, Paul Dupuis via use-livecode <use-livecode at lists.runrev.com> wrote:
>>> 
>>> dateItems does not contain the timezone offset, so you would need to get the timezone offset from the internet date (the only format I can find that has it) and the break the offset into minutes and hours and perform the math.
>>> 
>>> I haven't tested this code (yet), but I think the seconds is the way to go.
>>> 
>>> function refiXMLTimestamp
>>> -- Need to return the timestamp (current time) in UTC format, or YYYY-MM-DDTHH:MM:SSZ where Z is zulu or GMT
>>> local tTimestamp
>>> get the internet date -- Mon, 29 Jul 2024 16:49:52 -0400
>>> -- the day of the week followed by a comma, all other item delimited by a space
>>> -- the day of the month
>>> -- the three-letter abbreviation for the month name
>>> -- the four-digit year
>>> -- the time in 24-hour format, including seconds, delimited by colons
>>> -- the four-digit time zone relative to UTC (Greenwich) time
>>> set the itemDel to space
>>> put last item of it into tZoneOffset -- +/-hhmm
>>> set the itemDel to comma
>>> convert it to seconds
>>> -- the year
>>> -- the month number
>>> -- the day of the month
>>> -- the hour in 24-hour time
>>> -- the minute
>>> -- the second
>>> -- the numeric day of the week where Sunday is day 1, Monday is day 2, and so forth
>>> put    char -1 to -2 of tZoneOffset into tMinOffset
>>> delete char -1 to -2 of tZoneOffset
>>> put ((tZoneOffset*3600)+(tMinOffset*60)) into tSecOffset
>>> -- adjust time to zulu/gmt
>>> add tSecOffset to it
>>> convert it to dateItems
>>> -- Now convert to YYYY-MM-DDTHH:MM:SSZ where Z is zulu of GMT/UTC
>>> put format("%4u",item 1 of it) &"-"& format("%2u",item 2 of it) &"-"& format("%2u",item 3 of it)           into tTimestamp -- the date in new format
>>> put "T"& format(%2u",item 4 of it) &":"& format("%2u",item 5 of it) &":"& format("%2u",item 6 of it) &"Z" after tTimestamp -- the time in new format
>>> return tTimestamp
>>> end refiXMLTimestamp
>>> 
>>> On 7/29/2024 5:37 PM, Bob Sneidar via use-livecode wrote:
>>>> Convert it to dateitems, then back again.
>>>> 
>>>> Bob S
>>>> 
>>>> 
>>>>> On Jul 29, 2024, at 2:09 PM, Paul Dupuis via use-livecode <use-livecode at lists.runrev.com> wrote:
>>>>> 
>>>>> Follow up question/request:
>>>>> 
>>>>> put the internet date into tTimestamp -- stores something like Mon, 29 Jul 2024 16:49:52 -0400, where the -0400 is the time zone offset
>>>>> 
>>>>> Anyone have some already written code to convert this to a time in GMT (i.e where the time zone offset is +0000, i.e. Mon, 29 Jul 2024 20:49:52 +0000)?
>>>>> 
>>>>> It is adding the offset to the hours and minutes, but you have to handle carry over, potentially adding or subtracting a day.
>>>>> 
>>>>> If the best approach converting to seconds and the doing the math and converting back? (I think this is the answer)
>>>>> 
>>>>> 
>>>>> 
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