The Kobol files.
Go here:
http://www.kobol.com/archives/index.html
The FAQ E10, plus also "Time Units".
I highly recommend a visit to Sue Paxton's Battlestar Zone as well and her encyclopedia.
Trying to figure out the Colonial time units frustrated me to no end and I wished they had discarded them altogether and used "Earth" measurements, Colonialisms be fragged. Which gives you an idea of how much time I spent with them several yahrens ago.
I'm not bothered by the prospect of an Adama who is 120 years old. Good luck making sense of the mess.
