Does your format demand the time periods across the top and days down the side? If it doesn't, I'd try it the other way around. It seems to me it'd be easier to have the static seven days fixed as headers and the dynamic times on the side.

Also, I'm not sure how I'd do it, but I'm thinking some kind of bar or line chart might be appropriate here.

Sorry this is more hypothesis than concrete answers.

Hope it helps some though.

Good luck