
How Many Bitcoin Halvings Have There Been Before? The first-ever Bitcoin halving took place on Nov. 28, 2012 — slashing rewards to just 25 BTC. On this date, a. Bitcoin cash, which split from bitcoin back in 2017 amid a row over the size of bitcoin's block size, will see its reward for miners fall from 12.5. The Bitcoin Cash network, a result of a hard fork from Bitcoin, has split into two new blockchains, again. At press time, Bitcoin Cash ABC (BCH.