What is a Bitcoin halving?
Understand the block-subsidy rule, why the date moves, and why a halving does not guarantee a price outcome.
The subsidy falls about every 210,000 blocks
The Bitcoin network awards a block subsidy to miners who produce valid blocks. At intervals defined by the protocol, that subsidy is cut in half. The interval is approximately 210,000 blocks.
Block height records a block’s place in the chain. The direct trigger for a halving is therefore a target block height, not a calendar appointment.
Why does the date keep moving?
Explanations often use an average of ten minutes per block, but actual intervals vary. Faster and slower blocks change the estimated time at which the chain reaches its target.
The countdown combines current height with an average interval. It is not a time reserved by the network.
Supply rules and market price are separate
A halving reduces the rate of new issuance, but it does not guarantee a direction for market price. Demand, liquidity, and the wider economy are among the many other factors involved.
BtcCal keeps that distinction clear by omitting live prices, trading signals, and directional forecasts.