ICON Mainnet(Testnet ) will officially launch on January 24, 2018, one week before 2018 ICON Annual Summit.
On January 31, 2018, ICON team will host  1st ICON Annual Summit titled “The Genesis”
https://medium.com/helloiconworld/icon-annual-summit-mainnet-launch-release-candidate-6a6c5b5d86da