Bitcoin calendar.
Halvings and network upgrades, the US releases that move markets, conferences, and the anniversaries of Bitcoin's history. Dates are in UTC.
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BTC Balkans
ConferencesSunday 1 November
A two-day, community-run Bitcoin conference for the Balkans, with keynotes, panels and workshops.
August 2023
| Monday | Tuesday | Wednesday | Thursday | Friday | Saturday | Sunday |
|---|---|---|---|---|---|---|
| 1UASF, 2017 | 2Bitfinex hack, 2016 | 3 | 4 | 5 | 6 | |
| 7 | 8 | 9 | 10 | 11MicroStrategy buys, 2020 | 12 | 13 |
| 14 | 15Overflow bug, 2010 | 16 | 17 | 18 | 19 | 20 |
| 21 | 22 | 23 | 24SegWit, 2017 | 25 | 26 | 27 |
| 28 | 29Grayscale wins | 30 | 31 |
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Events in August 2023
Tuesday 1 August1188 days ago
The user-activated soft fork (BIP 148) takes effect, 2017
6 years ago. BIP 148, the "user-activated soft fork" (UASF), took effect at block 478,484: nodes running it would reject any block that did not signal support for SegWit. Miners were already signalling after a compromise proposal, BIP 91, so no split followed from it.
NetworkSee block 478,484SourceBIP 148, Mandatory activation of segwit deployment (from midnight 1 August 2017 UTC)
Wednesday 2 August1187 days ago
Bitfinex is hacked, 2016
7 years ago. Hackers stole 119,756 bitcoin, then worth about $72 million, from customer accounts at Bitfinex, a Hong Kong-based exchange, which halted trading. Bitfinex then spread the loss across all its customers, cutting every balance by about 36% and giving them tokens as credit for what they had lost.
MarketsSourceReuters, Bitcoin worth $72 million stolen from Bitfinex exchange in Hong Kong, 3 Aug 2016 (Wayback Machine copy)
Friday 11 August1178 days ago
MicroStrategy buys bitcoin for its treasury, 2020
3 years ago. MicroStrategy, a Nasdaq-listed software company, said it had bought 21,454 bitcoins for about $250 million and made bitcoin its primary treasury reserve asset, the main asset in which it holds its spare cash.
MarketsSourceMicroStrategy press release, MicroStrategy Adopts Bitcoin as Primary Treasury Reserve Asset (SEC Form 8-K, Exhibit 99.1)
Tuesday 15 August1174 days ago
The value overflow incident, 2010
13 years ago. A transaction in block 74,638 created about 184 billion bitcoin by exploiting a bug in how the software added up large amounts. Satoshi Nakamoto released a fix, Bitcoin 0.3.10, the same day, and the network replaced the bad block.
NetworkSee block 74,638SourceBitcoin Wiki, Value overflow incident
Thursday 24 August1165 days ago
SegWit activates, 2017
6 years ago. Segregated Witness (SegWit) took effect at block 481,824. It moves signatures into a separate part of the block, which fixes transaction malleability (the ability to change a transaction's ID before it confirms) and raises block capacity.
NetworkSee block 481,824SourceBitcoin Core source, SegwitHeight = 481824 with the block hash
Tuesday 29 August1160 days ago
Court rules for Grayscale against the SEC
A US appeals court ruled that the SEC's rejection of Grayscale's plan to turn its bitcoin trust into a spot bitcoin ETF, a fund holding bitcoin itself, was "arbitrary and capricious", because the SEC had approved similar bitcoin futures funds without explaining the difference. The court cancelled the SEC's order.
PolicySourceUS Court of Appeals for the D.C. Circuit, Grayscale Investments, LLC v. SEC, No. 22-1142, opinion (decided 29 August 2023)