1 hour date/time diff since TC8 in Windows 7

[ricobautsch]

Using TC 8 on Windows 7 i recently noticed a strange date/time behavior.

I have a FS-Plugin, where i return virtual files with a special Date to TC in the FindFirst/FindNext loop.

In practice i build a virtual file list with german holidays.
For example:
FileName Date
------------------------------------
1.Christmas-Day 25.12.2012 0:00
2.Christmas-Day 26.12.2012 0:00

Since TC8 on Windows 7 i see a Date/Time with 1 hour less than expected.
This occurs only for Date/Time outside the DST (Daylight Saving Time)
The result is now 24.12.2012 23:00 for the 1.Christmas-Day and the same 1 hour difference with the 2.Christmas-Day.


Searching the forum pointed me to the new configuration "NewTimeZoneMethod",
which defaults to 1 for Windows 7, and defaults to 0 for Vista (because on Vista i cannot reproduce the problem, if the setting is missing in the ini)

For my special case, this new behavior is wrong.
Of course, i could set NewTimeZoneMethod=0 for myself, but i cannot guarantee it's set for other users of my plugin.

The only workaround i can see is to read the NewTimeZoneMethod from ini and if it is set to 1 then add one hour to the timestamp, if we are in DST (Daylight Saving Time).

Are there any better ways to solve the problem?

[ghisler(Author)]

This is a difficult question which even Microsoft couldn't resolve - actually different time zone conversion methods would be needed when the timestamp is stored as local time (e.g. FAT32) and when it's stored as UTC (Greenwhich mean time). I do not have a solution to this problem either. Internally, TC stores timestamps as UTC, and converts them to local time only when displaying them in the file lists.