Or do it like this, which does not require LocalePlugin:

  localMicrosecondClockDave
      | timeArray |
      timeArray := self primPosixMicrosecondClockWithOffset.
      ^timeArray first + ((2177452800 + timeArray second) * 1000000).

Dave


On Sun, Apr 02, 2017 at 02:08:07PM +0200, Levente Uzonyi wrote:
> Hi Herbert,
> 
> This issue was discussed[1] here recently. I suggested[2] a VM change to 
> solve this problem, but the same thing can be done on the image side too.
> Just change Time class >> #utcMicrosecondClockWithOffset to be:
> 
> utcMicrosecondClockWithOffset
> 	"Answer an array with UTC microseconds since the Smalltalk epoch and 
> 	the
> 	current seconds offset from UTC in the local time zone."
> 
> 	| utc currentMinute |
> 	utc := self utcMicrosecondClock.
> 	currentMinute := utc // 60000000.
> 	LastTimeTimeZoneWasUpdated = currentMinute ifFalse: [
> 		LastTimeTimeZoneWasUpdated := currentMinute.
> 		TimeZoneOffset := Locale current primTimezone * 60 ].
> 	^{ utc. TimeZoneOffset }
> 
> and Time class >> #localMicrosecondClock to be:
> 
> localMicrosecondClock
> 	"Answer the local microseconds since the Smalltalk epoch (January 
> 	1st 1901, the start of the 20th century).
> 	 The value is derived from the current UTC wallclock time and the 
> 	 image's current notion of time zone."
> 
> 	| utcMicrosecondClockWithOffset |
> 	utcMicrosecondClockWithOffset := self utcMicrosecondClockWithOffset.
> 	^(utcMicrosecondClockWithOffset at: 2) * 1000000 + 
> 	(utcMicrosecondClockWithOffset at: 1)
> 
> 
> LastTimeTimeZoneWasUpdated and TimeZoneOffset should be class variables. 
> They don't have to be initialized.
> 
> Levente
> 
> [1] 
> http://lists.squeakfoundation.org/pipermail/squeak-dev/2017-March/193594.html
> [2] 
> http://lists.squeakfoundation.org/pipermail/squeak-dev/2017-March/193638.html
> 
> On Sun, 2 Apr 2017, Herbert K?nig wrote:
> 
> >Hi all,
> >
> >I have a long running 5.1 image on a Raspi A+ which regularly waits on a 
> >Delay.
> >
> >Raspbian has noticed daylight saving, Squeak not.
> >
> >Is this expected and what can I do with the running image to make it 
> >notice? Except waiting for the monthly crash and restart :-)
> >
> >
> >Cheers,
> >
> >Herbert
> >
> >
> >

>