BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Smart Calendars AI//CalFeed//EN
CALSCALE:GREGORIAN
METHOD:REQUEST
X-WR-CALNAME:Ethereum: Byzantium Mainnet Upgrade
BEGIN:VEVENT
UID:f482e8f2-f42e-45d4-a1af-6f3ffd89fa95.ethereum-mainnet:meta-eip:609@smar
 tcalendars.ai
DTSTAMP:20260719T070631Z
DTSTART;VALUE=DATE:20171016
DTEND;VALUE=DATE:20171017
SEQUENCE:0
STATUS:CONFIRMED
SUMMARY;LANGUAGE=en:Ethereum: Byzantium Mainnet Upgrade
DESCRIPTION;LANGUAGE=en:Ethereum activated the Byzantium network upgrade on
  Ethereum mainnet.\n\nActivation block: 4\,370\,000.\n\nIncluded EIPs: EIP
 -100\, EIP-140\, EIP-196\, EIP-197\, EIP-198\, EIP-211\, EIP-214\, EIP-649
 \, EIP-658.\n\nHardfork Meta: EIP-609.\n\nOfficial specification: https://
 eips.ethereum.org/EIPS/eip-609\n\nSources: Ethereum Improvement Proposals 
 (CC0) and ethereum.org (CC BY 4.0).
URL:https://eips.ethereum.org/EIPS/eip-609
CATEGORIES:Finance,Crypto,Ethereum,Network-Upgrade,Hard-Fork,Activated
END:VEVENT
END:VCALENDAR