28/07/2020: Ethereum 2.0 Testnet Launch
The Beacon Chain, the first phase of Ethereum 2.0, goes live on a public testnet, marking a significant step towards the transition to a proof-of-stake consensus mechanism.
20/07/2017: Ethereum Hard Forks: Byzantium
The Ethereum network undergoes a hard fork upgrade named Byzantium, implementing various improvements to enhance scalability, privacy, and security.
17/06/2016: The DAO Hack
The Decentralized Autonomous Organization (DAO), built on the Ethereum platform, suffers a major security breach, resulting in the theft of approximately 3.6 million ETH tokens.
30/07/2015: Ethereum Mainnet Launched
The Ethereum mainnet is released, enabling developers around the world to build and deploy decentralized applications on the Ethereum blockchain.
30/06/2015: Demonetization of old Guinean franc banknotes
The old series of Guinean franc banknotes, denominated in 'Syli,' ceased to be legal tender, and only the new franc banknotes remained in circulation.
30/07/2013: Ethereum Whitepaper Published
Vitalik Buterin publishes the Ethereum whitepaper, outlining a new blockchain platform designed to support decentralized applications and smart contracts.
26/09/2012: Introduction of new Guinean franc coins
New coins denominated in the Guinean franc were introduced, replacing the previously used Guinean syli coins.
30/06/2010: Revaluation of the Guinean franc
The Guinean franc underwent a revaluation, with 1 new franc being equivalent to 10,000 old francs.
03/01/2009: Bitcoin Genesis Block Created
The first block of the Bitcoin blockchain, known as the Genesis Block, is mined by Satoshi Nakamoto, marking the birth of the Bitcoin network.
31/10/2008: Bitcoin Whitepaper Published
Satoshi Nakamoto releases a whitepaper titled 'Bitcoin: A Peer-to-Peer Electronic Cash System,' introducing the concept of a decentralized digital currency.
30/06/1997: Introduction of new Guinean franc
A new series of Guinean franc banknotes, denominated in 'Syli,' was introduced as a replacement for the previous currency.
30/11/1985: Devaluation of the Guinean franc
The Guinean franc was devalued by 50%, leading to an economic crisis and high inflation.
31/05/1971: Redenomination of the Guinean franc
The Guinean franc underwent a redenomination, with 1 new franc being equivalent to 10 old francs.
01/10/1959: Introduction of Guinean franc
The Guinean franc was introduced as the official currency of Guinea following its independence from France.