DVR clock

When we had the time change a couple of weeks ago, my dvr clock didn't make the change. (Maybe it thinks we ought to leave time the way it originally was)

But I have worked thru the settings on my remote and cannot find one that will update the clock. I would think it should update itself, but it didn't and I can't find a way for me to do it.

Please advise how I can get the dvr machine up to date.