EDIT: Oh, that's when you successfully mine a block. I'm guessing they chose the name "Coinbase" instead of "reward" to promote Coinbase.
[1] https://github.com/bitcoin/bitcoin/blob/master/src/coins.cpp
EDIT: Oh, that's when you successfully mine a block. I'm guessing they chose the name "Coinbase" instead of "reward" to promote Coinbase.