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>>>The only adjustment I suspect VFP makes is usage of seconds() over midnight - it was changed at some point to continue counting and not reset to zero. Not sure when does it actually reset - there's zero mention of any change in the Help.
>>
>>Please pardon me for jumping in. First of all, isn't this really a storm in a teacup?
>
>If you're having something timed to go off in 20 hours, and you set it to happen at 15:00, wouldn't you be surprised when it would go off at 14:00? IOW, there may be some of those 'mission critical' things where this may matter.

Yes, for time critical automatic systems, DST is of course a huge problem. But in most cases where this extra or missing hour must be counted for, I am pretty sure that most people will simply correct it manually. For example if you work night shift and are paid by the hour, they will most likely add or substract an hour manually.