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Daylight Savings Time on FAT32

I have a program that copies files based on file dates: if the source
file is newer than the destination file then the source file overwrites
the destination. The problem is, when the clocks changed at daylight
savings time the timestamps on the destination (NTFS) changed but the
source (Fat32) did not. So now it wants to copy the whole source drive
because the time stamps are an hour newer than the destinations.
It appears FAT32 stores local time, then calculates backward to GMT to
get ftLastWriteTime, whereas NTFS stores ftLastWriteTime, then calculates
forward to get local time. Both apply the DST offset but since they are
calculating in opposite directions, the local time and ftLastWriteTime will
not match in the opposite DST period.

Is there a way to stop this?
Either get both uncorrected timestamps or check if DST is being applied?

Dec 4 '06 #1
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