DST in Fios-land

The DVR did not change its clock when the other electronic devices did. A while back I spent 45 minutes on hold, waiting for tech support, and gave up. Yesterday I got out the owner's manual to see whether there is some way to fix the clock by actually touching the DVR, but didn't bother to read it. This morning the time was still wrong. Now it's correct, two months and a few hours after the laptop & the telephone corrected themselves.