At what time will that ETH hard fork happen?
About 3 hours are left for the hardfork of ehtereum.
You can track it at
https://etherscan.io/how long will it take or is it instant?
According to me, it would be instantaneous. Changes to the network have already been designed by developers and available online on github. So at the time of hard fork, it would be just a mere implementation of the codes. Implementation, i think, wouldn't take time.
Update: Source from
http://www.coindesk.com/october-ethereum-hard-fork-network-spam-attacks/.
It says,
" the ethereum community is set to
adopt a patch for the issue at block 2,463,000 on its main blockchain,"