https://gov.yearn.finance/t/yip-65-evolving-yfi-to... @yearnfinance

Answer: The TGE of YFI happened on June 18, 2020. It was a decentralized launch of the YFI token, with no pre-sale, no private sale, and no ICO. The only way to get YFI tokens was to participate in the YFI liquidity mining program. This program rewarded users who provided liquidity to the Yearn finance protocol with YFI tokens. The TGE was a success, with more than $2 million worth of YFI tokens being distributed to participants in the liquidity mining program. The success of the TGE has been credited as one of the main reasons for YFI's meteoric rise in value since its launch.

when was the TGE of YFI happened?