I would like to assume the same thing which happened to the Cell Phones during their own
digital transition from analog (AMPS) to digital (CDMA/GSM) on February 18, 2008. i had an old AMPS mobile phone which didn't quit working then, and didn't for a week or so later. so i would assume it won't be a 'hard off' like it's advertised, but a 'soft off' as stations one by one, turn off their transmitters. i would say there will still be a few laggers behind who leave their stations up on analog for a few days later either way. Keep in mind though that since government REQUIRES
EAS alerts on stations, those who cannot receive digital may still have one analog channel to tune to so they can still receive the
EAS warnings over TV. it may only be audio with a test pattern like Channel 2 was before the
TVGOS channel ended up there.
It won't be like the supposed Y2K scare and be dead at the stroke of midnight. that's unrealistic.