BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//UTXOHub//Bitcoin calendar//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:Bitcoin calendar: Network (UTXOHub)
X-WR-CALDESC:Bitcoin's network dates\, market-moving releases\, conferences
  and anniversaries\, from utxohub.com/calendar.
REFRESH-INTERVAL;VALUE=DURATION:PT12H
X-PUBLISHED-TTL:PT12H
BEGIN:VEVENT
UID:difficulty-975744@utxohub.com
DTSTAMP:20261030T114544Z
DTSTART;VALUE=DATE:20261113
DTEND;VALUE=DATE:20261114
SUMMARY:Difficulty adjustment (estimate)
DESCRIPTION:At block 975\,744\, mining is expected to get about 3.7% easier
 \, so blocks keep arriving about every 10 minutes. The date is worked out 
 from recent block times and may move by a few days.\n\nhttps://utxohub.com
 /calendar
URL:https://utxohub.com/calendar
CATEGORIES:Network
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:taproot-activation-2021-2026@utxohub.com
DTSTAMP:20261030T114544Z
DTSTART;VALUE=DATE:20261114
DTEND;VALUE=DATE:20261115
SUMMARY:Taproot activates\, 2021
DESCRIPTION:5 years ago. The Taproot upgrade took effect at block 709\,632.
  It added Schnorr signatures and a new kind of output that reveals less ab
 out complex spending conditions\, making them cheaper and more private.\n\
 nhttps://utxohub.com/history/taproot
URL:https://utxohub.com/history/taproot
CATEGORIES:Network
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:first-halving-2012-2026@utxohub.com
DTSTAMP:20261030T114544Z
DTSTART;VALUE=DATE:20261128
DTEND;VALUE=DATE:20261129
SUMMARY:The first halving\, 2012
DESCRIPTION:14 years ago. At block 210\,000 the reward for mining a block f
 ell from 50 to 25 bitcoin\, the first halving. The software halves the rew
 ard every 210\,000 blocks\, roughly every four years.\n\nhttps://github.co
 m/bitcoin/bitcoin/blob/master/src/kernel/chainparams.cpp
URL:https://github.com/bitcoin/bitcoin/blob/master/src/kernel/chainparams.c
 pp
CATEGORIES:Network
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:fourth-halving-2024-2027@utxohub.com
DTSTAMP:20261030T114544Z
DTSTART;VALUE=DATE:20270420
DTEND;VALUE=DATE:20270421
SUMMARY:The fourth halving\, 2024
DESCRIPTION:3 years ago. At block 840\,000 the reward for mining a block fe
 ll from 6.25 to 3.125 bitcoin\, the fourth halving.\n\nhttps://github.com/
 bitcoin/bitcoin/blob/master/src/kernel/chainparams.cpp
URL:https://github.com/bitcoin/bitcoin/blob/master/src/kernel/chainparams.c
 pp
CATEGORIES:Network
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:third-halving-2020-2027@utxohub.com
DTSTAMP:20261030T114544Z
DTSTART;VALUE=DATE:20270511
DTEND;VALUE=DATE:20270512
SUMMARY:The third halving\, 2020
DESCRIPTION:7 years ago. At block 630\,000 the reward for mining a block fe
 ll from 12.5 to 6.25 bitcoin\, the third halving.\n\nhttps://github.com/bi
 tcoin/bitcoin/blob/master/src/kernel/chainparams.cpp
URL:https://github.com/bitcoin/bitcoin/blob/master/src/kernel/chainparams.c
 pp
CATEGORIES:Network
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:block-1000000@utxohub.com
DTSTAMP:20261030T114544Z
DTSTART;VALUE=DATE:20270518
DTEND;VALUE=DATE:20270519
SUMMARY:Block 1\,000\,000 (estimate)
DESCRIPTION:Bitcoin's millionth block. Nothing changes in how Bitcoin works
 \; it's a round number. The date is worked out from recent block times and
  may move by a few days.\n\nhttps://mempool.space/
URL:https://mempool.space/
CATEGORIES:Network
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:second-halving-2016-2027@utxohub.com
DTSTAMP:20261030T114544Z
DTSTART;VALUE=DATE:20270709
DTEND;VALUE=DATE:20270710
SUMMARY:The second halving\, 2016
DESCRIPTION:11 years ago. At block 420\,000 the reward for mining a block f
 ell from 25 to 12.5 bitcoin\, the second halving.\n\nhttps://github.com/bi
 tcoin/bitcoin/blob/master/src/kernel/chainparams.cpp
URL:https://github.com/bitcoin/bitcoin/blob/master/src/kernel/chainparams.c
 pp
CATEGORIES:Network
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:uasf-bip148-2017-2027@utxohub.com
DTSTAMP:20261030T114544Z
DTSTART;VALUE=DATE:20270801
DTEND;VALUE=DATE:20270802
SUMMARY:The user-activated soft fork (BIP 148) takes effect\, 2017
DESCRIPTION:10 years ago. BIP 148\, the "user-activated soft fork" (UASF)\,
  took effect at block 478\,484: nodes running it would reject any block th
 at did not signal support for SegWit. Miners were already signalling after
  a compromise proposal\, BIP 91\, so no split followed from it.\n\nhttps:/
 /github.com/bitcoin/bips/blob/master/bip-0148.mediawiki
URL:https://github.com/bitcoin/bips/blob/master/bip-0148.mediawiki
CATEGORIES:Network
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:value-overflow-incident-2010-2027@utxohub.com
DTSTAMP:20261030T114544Z
DTSTART;VALUE=DATE:20270815
DTEND;VALUE=DATE:20270816
SUMMARY:The value overflow incident\, 2010
DESCRIPTION:17 years ago. A transaction in block 74\,638 created about 184 
 billion bitcoin by exploiting a bug in how the software added up large amo
 unts. Satoshi Nakamoto released a fix\, Bitcoin 0.3.10\, the same day\, an
 d the network replaced the bad block.\n\nhttps://en.bitcoin.it/wiki/Value_
 overflow_incident
URL:https://en.bitcoin.it/wiki/Value_overflow_incident
CATEGORIES:Network
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:segwit-activation-2017-2027@utxohub.com
DTSTAMP:20261030T114544Z
DTSTART;VALUE=DATE:20270824
DTEND;VALUE=DATE:20270825
SUMMARY:SegWit activates\, 2017
DESCRIPTION:10 years ago. Segregated Witness (SegWit) took effect at block 
 481\,824. It moves signatures into a separate part of the block\, which fi
 xes transaction malleability (the ability to change a transaction's ID bef
 ore it confirms) and raises block capacity.\n\nhttps://github.com/bitcoin/
 bitcoin/blob/master/src/kernel/chainparams.cpp
URL:https://github.com/bitcoin/bitcoin/blob/master/src/kernel/chainparams.c
 pp
CATEGORIES:Network
TRANSP:TRANSPARENT
END:VEVENT
END:VCALENDAR