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

[Bob Koehler]

In article <q84l2a$s2o$1 at dont-email.me>, =?UTF-8?Q?Jan-Erik_S=c3=b6derholm?= <jan-erik.soderholm at telia.com> writes:
> 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.
> 

   Double precisionn floating point date/time in the format
      YYYMMDD.hhmmss .... (to whatever fraction of seconds 64 bits holds)

   Been in use since the 1960s in a package that operates with lots of
   different epochs, handles leap seconds, ...