We're getting ready for Bitcoin Core's 0.13.1 release - the first one
to include segregated witness (BIP 141, 143, 144, 145) for Bitcoin
mainnet, after being extensively tested on testnet and in other
software. Following the BIP9 recommendation  to set the versionbits
start time a month in the future and discussion in the last IRC
meeting , I propose we set BIP 141's start time to November 15,
2016, 0:00 UTC (unix time 1479168000).
Note that this is just a lower bound on the time when the versionbits
signalling can begin. Activation on the network requires:
(1) This date to pass
(2) A full retarget window of 2016 blocks with 95% signalling the
version bit (bit 1 for BIP141)
(3) A fallow period consisting of another 2016 blocks.
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