user31795: Is there a conflict as to when the halving will occur and Bitcoin miner rewards become 12.5? Is is set in stone to happen this July or is it after a certain amount of blocks?

user208: It is exactly at block 420000.
When block 420000 will be mined is not certain, as the block mining process is random and influenced by hashrate variation.

31795: <p>Is there a conflict as to when the halving will occur and Bitcoin miner rewards become 12.5? Is is set in stone to happen this July or is it after a certain amount of blocks?</p>
 208: <p>It is exactly at block 420000.</p>

<p>When block 420000 will be mined is not certain, as the block mining process is random and influenced by hashrate variation.</p>
