Deposits will open tomorrow (Jan 25) and the first auction will happen on Friday (Jan 27) morning Eastern Standard time.
Liquidity migration from mainnet to arbitrum will happen roughly around midnight UTC (Jan 23).
Preliminary V3 timeline has been included on the community site, however more concrete timelines will be known in 2 weeks (notes.premia.community)
The team is working on strike & maturity validation functions, as well as exercise & settlement functions.