31 March 2018. (or earlier)Direct Market Access Beta: "No additional info" (source)
31 March 2018. (or earlier)LIQUID World Book Beta: "Beta Release: The World Book brings together the network of cryptocurrency exchanges to enable the highest level of liquidity to all market" (source)
30 June 2018. (or earlier)Official LIQUID Launch: "The launch of the official platform" (source)