Wow that is weird. Kip is very knowledge and detail oriented, so I bow to his authority, but I thought I would brain storm a few possibilities see if any ring a bell with you.
- Test of EAS?
- Do you have some kind of electrical timer? Sprinklers for the grass? Maybe tripping the power on a Amp?
- Do you have something delivered or something done on your property on the 12th? Oil? Septic? Etc
- When you say "My cable shuts off" could you describe that? Do you get a error message? All snow? Black screen?
- What do you do to fix it? Does it come back on it's own?
- Does it happen at the same time each morning on the 12th?