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I always forget at least one camera when switching to/from DST, and I always forget the command for exiftool to batch-adjust the image timestamps.

For future reference:

exiftool "-DateTimeOriginal+=1:00" DIR
for going into DST, and
exiftool "-DateTimeOriginal-=1:00" DIR
for going out.

via https://petapixel.com/2012/11/05/how-to-fix-your-timestamps-if-you-forgot-to-update-your-camera-for-daylight-savings/