Bitcoin Calendar
Celebrating Bitcoin's Historic Moments
Events in August 2025
Bitcoin Independence Day
User-activated soft fork (UASF) threatened to split the chain if miners didn't signal for Segregated Witness. This grassroots movement demonstrated user power and helped activate this crucial scaling upgrade.
Bitfinex Hack
Hackers stole nearly 120,000 BTC from Bitfinex crypto exchange, worth $72 million at the time. The exchange socialized losses across all users and later fully compensated them, setting a precedent for hack recovery.
Segwit Lock In Day
Segregated Witness (Segwit) officially 'locked in', beginning a two-week grace period before activation. This ended the years-long scaling debate and enabled Lightning Network development.
Bitcoin Network Downtime
Bitcoin experienced network issues on August 15 in both 2010 (value overflow bug creating 184 billion BTC) and 2013 (blockchain fork). Both were quickly resolved, demonstrating the network's resilience.
Bitcoin.org Domain Registration
Satoshi Nakamoto registered the domain name bitcoin.org through anonymousspeech.com, preparing for the release of the whitepaper. This was one of the first public traces of the Bitcoin project.
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Bitcoin Infinity
Bitcoin Infinity Day celebrates the concept of all value being divided into 21 million units. The date 8/21 represents infinity over 21 million, highlighting Bitcoin's unique property of absolute scarcity with infinite divisibility.
Segwit Activation
Segregated Witness (Segwit) officially 'activated' on the Bitcoin network, ending the transaction malleability bug and increasing block capacity. This paved the way for Lightning Network and other layer-2 solutions.
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