Bitcoin Halvening Dates, Circulating Supply and Total % Mined

It's amazing to think about the fact that currently 79.5% of all the Bitcoin that will ever exist has already been mined (and almost 25% of that current total has already been lost forever), and that almost all the rest will be mined in just the next 6 years bringing the total mined to 93.5% by 2024, leaving only 6.5% more left to be mined between the years 2025-2140. Basically this bull is moon-bound! Supply and demand folks... supply and demand!

Bitcoin Halving Data Chart

Bitcoin Halving In The Code

How are bitcoin created

bitcoin are created through a process called “mining.” Mining consists in adding transaction records to Bitcoin’s public ledger of past transactions. This ledger is called the blockchain because it is a chain of blocks. Mining is essentially a record-keeping service, and miners, who keep the blockchain consistent, complete, and unalterable by repeatedly verifying and collecting the newly broadcast transactions into new blocks, are rewarded with a set amount of newly created bitcoins and transaction fees.

Bitcoin’s code commands that every 210,000 blocks, the amount of new bitcoins created is cut in half. When Bitcoin was launched in 2009, miners were rewarded with 50 bitcoins per block. The reward was halved in November 2012 to 25 BTC/block when we entered the second reward era. The third reward era already took place and bitcoins reward was halved to 12.5 BTC/block. This event is was called the Bitcoin reward halving, or “halvening.”

Since the Bitcoin protocol dictates that no more than 21 million bitcoins will ever be created, there is a point where miners will be solely rewarded by transaction fees.
https://coinjournal.net/halvening-explained-infographic/