Working with timeseries of environmental data, there is a big need to have the daylight saving switched OFF, else the unique dates will appear more than once :)
For now, with hsqldb and java there is only one way I found to deal with that, i.e. setting another timezone.
In the Italian Job case, Africa answers the call for help:
saves us by giving the same zone, but without the daylight saving.
Thank God there is Kinshasa! ;)