Last weekend (at least in CET-timezone) there was the timeshift from daylight saving time (DST) to normal time.
I thought I had captured all negative effects of "my" application after last years timeshift but as I had to notice I had not. This brought me up to the question: How to test timeshifts, especially the critical "negative" one from DST to normal?
I know there are workarounds this problems by setting the severs to a non-timeshift-zone (like UCT) but assuming your server is set to CET (or any other timezone with timeshifts) how could this be tested? What has to be thought about? Is it enough to manually set the clock of the server? What about client software?
I'm almost sure there are more points you should be aware of but these are the ones that came into my mind.