Hi, I wonder if you had a power cut at some point? Only my hub did this only a few days ago after we had a power cut! Took me ages to work out why my hub kept turning itself off every few minutes, until I looked at hub stats and found the time had gone back to midnight in 2003 as well! Due to my hub being set to power off at night, it kept turning off thinking it was night!!
I have had to set my timing to manual, as the other ones don't set it to the right time.