Bitcoin calendar.
Halvings and network upgrades, the US releases that move markets, conferences, and the anniversaries of Bitcoin's history. Dates are in UTC.
Today
BTC Balkans
ConferencesSunday 1 November
A two-day, community-run Bitcoin conference for the Balkans, with keynotes, panels and workshops.
August 2019
| Monday | Tuesday | Wednesday | Thursday | Friday | Saturday | Sunday |
|---|---|---|---|---|---|---|
| 1UASF, 2017 | 2Bitfinex hack, 2016 | 3 | 4 | |||
| 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| 12 | 13 | 14 | 15Overflow bug, 2010 | 16 | 17 | 18 |
| 19 | 20 | 21 | 22 | 23 | 24SegWit, 2017 | 25 |
| 26 | 27 | 28 | 29 | 30 | 31 |
Adds the dates ahead to Apple Calendar or Outlook, and keeps them up to date. In Google Calendar, use Add to Google Calendar, or download the file.
Events in August 2019
Thursday 1 August2649 days ago
The user-activated soft fork (BIP 148) takes effect, 2017
2 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)
Friday 2 August2648 days ago
Bitfinex is hacked, 2016
3 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)
Thursday 15 August2635 days ago
The value overflow incident, 2010
9 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
Saturday 24 August2626 days ago
SegWit activates, 2017
2 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