Stan Brown on Mon, 11 Mar 2019 12:05:59
-0400 typed in alt.windows7.general the following:
On Sun, 10 Mar 2019 22:23:09 -0700, pyotr filipivich wrote:

Greetings

I have a batch file using Robocopy which is only suppose to copy
those files which are "newer" (I.e., modified) than the ones on the
drive. Usually, there is no problem. But tonight, as I go to close
up operations for the evening, it is copying far more files than
before. all tagged "newer".
Was there something magical about the shift to Daylight Savings
time which makes a source drive file dated "Jan 2 2019 10:20 AM" to
now be "newer" than the target drive file dated "Jan 2 2019 10:20
AM"?

If you use the /TS option, robocopy will show you the timestamps of
the source file.

That it does.

Even as it updates all the files on thumbdrive G: from Thumbdrive
F: - both FAT32.

Meh. Major issue is that, knowing this, I will know to sync
thumbdrives earlier in the day, in order to not have to wait a half
hour while it updates all the files.

Now the question comes to me: what about the files on the external
hard drives, which are NTFS?

When the source file is on an NTFS drive, that will
be in UTC, not your local time. (The timestamps displayed in File
Explorer are converted from the NTFS native UTC to your time zone.)

Sigh, one more place where the softies have gotten "clever."

In the words of Zorba: Clever people and Grocers; they weigh
everything.

--
pyotr filipivich
Next month's Panel: Graft - Boon or blessing?