Take a look at what Erol created for days of the week
and if you follow the links you’ll find a mnemonic for remembering times. I found another one for time (I’d give credit but don’t have it in my notes, so apologize for not doing that) that I use. It’s based (roughly) on the location of cities and the numbers on a clock.
12-Minneapolis
1-Chicago
2-NY
3-DC
4-Charleston
5-Miami
6-Dallas
7-Phoenix
8-LA
9-SF
10-Portland, Oregon
11-Seattle
1/2 past-split the image in two
quarter-past - add a quarter (coin) to the image
quarter to-add a Colt 45 to the image
I’ve used this technique to remember a meeting on the fly, but never for an entire day’s worth of meetings. Perhaps (as others have suggested) using the above and a memory palace.
Good luck and let us know how things go.