A problem with noting a "date of germination" is that if you have a batch of seeds, they aren't all germinating on the same day. If you have the one lonely seed, then perhaps that is feasible, but for the most part, it isn't.
Transplanting for me isn't really record-worthy either, unless I am using some exotic mix that I could never remember otherwise. The only things that I keep exact records on are things like coffee treatments, Neem oil applications, and the very rare fertilizing.