BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Smart Calendars AI//CalFeed//EN
CALSCALE:GREGORIAN
METHOD:REQUEST
X-WR-CALNAME:Ethereum: Istanbul Mainnet Upgrade
BEGIN:VEVENT
UID:f482e8f2-f42e-45d4-a1af-6f3ffd89fa95.ethereum-mainnet:meta-eip:1679@sma
 rtcalendars.ai
DTSTAMP:20260719T070920Z
DTSTART;VALUE=DATE:20191208
DTEND;VALUE=DATE:20191209
SEQUENCE:0
STATUS:CONFIRMED
SUMMARY;LANGUAGE=en:Ethereum: Istanbul Mainnet Upgrade
DESCRIPTION;LANGUAGE=en:Ethereum activated the Istanbul network upgrade on 
 Ethereum mainnet.\n\nActivation block: 9\,069\,000.\n\nIncluded EIPs: EIP-
 152\, EIP-1108\, EIP-1344\, EIP-1884\, EIP-2028\, EIP-2200.\n\nHardfork Me
 ta: EIP-1679.\n\nOfficial specification: https://eips.ethereum.org/EIPS/ei
 p-1679\n\nSources: Ethereum Improvement Proposals (CC0) and ethereum.org (
 CC BY 4.0).
URL:https://eips.ethereum.org/EIPS/eip-1679
CATEGORIES:Finance,Crypto,Ethereum,Network-Upgrade,Hard-Fork,Activated
END:VEVENT
END:VCALENDAR