[Info-vax] EU will abandon daylight savings time in 2021

[Jan-Erik Söderholm]

Den 2019-04-05 kl. 15:26, skrev Arne Vajhøj:
> On 4/5/2019 9:22 AM, Arne Vajhøj wrote:
>> On 4/5/2019 6:48 AM, Arne Vajhøj wrote:
>>> On 4/5/2019 4:27 AM, Jan-Erik Söderholm wrote:
>>>> Den 2019-04-05 kl. 02:02, skrev Arne Vajhøj:
>>>>> On 4/4/2019 6:08 AM, Jan-Erik Söderholm wrote:
>>>>>> Den 2019-04-04 kl. 03:27, skrev Arne Vajhøj:
>>>>>>> On 4/3/2019 1:37 PM, Jan-Erik Söderholm wrote:
>>>>>>>>                        We have some local timestamps that has to be
>>>>>>>> converted to GMT/UTC before sent to another system, and these are both
>>>>>>>> from "winter time" and "summer time". We can of course hardcode the
>>>>>>>> dates for the switches and compare, but it would be nice if the rule
>>>>>>>> could be used...
>>>>>>>
>>>>>>> What do you have and what do you need to convert it to?
>>>>>>
>>>>>> An INTEGER "date" with format YYYYMMDD, ag 20190404 for today.
>>>>>>
>>>>>> A SMALLINT "time" with format HMM or HHMM, range from 1 (one minute
>>>>>> after midnight) to 2359 (one minute before midnight). I guess
>>>>>> it could be zero also for the first minute after midnight, but
>>>>>> the system is having it's night-batch windows then.
>>>>>>
>>>>>> These two are in Swedish local time (winter or summer time).
>>>>>>
>>>>>> The target system uses Unix Epoch format (seconds since some date).
>>>>>
>>>>> I am not a Python expert, but it looks like:
>>>>>
>>>>> from datetime import date
>>>>> import time
>>>>>
>>>>> v = 20190404
>>>>> d = date(v / 10000, (v / 100)  % 100, v % 100)
>>>>> t = time.mktime(d.timetuple())
>>>>>
>>>>> works for the first conversion.
>>>>
>>>> No poblem, we have that part since some time. But to a
>>>> epoch time in local time, not to GMT/UTC.
>>>
>>> That code snippet returns UTC here.
>>>
>>> But I admit that I did not test on VMS. I can try that.
>>
>> I tried on VMS.
>>
>> It looks like it does UTC but does not handle DST.
>>
>> Either the old Python 2.7.2 has a DST bug or I messed
>> up the TZ DST setting.
> 
> It was my TZ DST setup that was wrong.
> 
> It works now.
> 
> UTC.
> 
> Arne
> 
> 

OK. If you like, you could either post your Python test code
or, again if you like, mail it to me.

Jan-Erik.