This method looks really handy! I’ll have to give it a go sometime.
For more granular time in my Swyvers campaign I’ve just been using the Time Sheet printout in the back of Cess and Citadel (with a d6 representing tens of minutes; 10, 20, 30, etc.) and that’s been working alright; but definitely a way to track multiple different groups long-term would be helpful - especially when they get “out of sync”. I think this will solve that nicely!
I’m considering just doing downtime sessions for the number of days skipped at the start of each group to let each “rubber-band” up to the others - and that works quite well for a game set in the city where criminals will want to spend their goods after each heist - but we’ll see. One of my groups is play-by-post so that might prove tricky.
Do you have any good tactics for keeping them in sync? Particularly across a small space?