Starting Time of Zcash Launch?

[CryptoYeti]

It appears the question has been indirectly answered:

@zooko

It takes some time to generate the genesis block, and build the binaries. We’re going to mint the genesis block and prepare binaries and things the night before (i.e. tomorrow evening, Thursday, Oct 27). Then go to sleep. Then get up and release it the next morning, San Francisco time. Keep an eye on our twitter feed: https://twitter.com/ZcashCo !

So sometime Friday morning San Francisco time (PST).