diff --git a/bip-0147.mediawiki b/bip-0147.mediawiki
index 352f48d4..001abc65 100644
--- a/bip-0147.mediawiki
+++ b/bip-0147.mediawiki
@@ -28,7 +28,7 @@ To fix the dummy element malleability, a new consensus rule ("<code>NULLDUMMY</c
 
 This BIP will be deployed by "version bits" [https://github.com/bitcoin/bips/blob/master/bip-0009.mediawiki BIP9] using the same parameters for BIP141 and BIP143, with the name "segwit" and using bit 1.
 
-For Bitcoin mainnet, the BIP9 starttime is midnight TBD UTC (Epoch timestamp TBD) and BIP9 timeout is midnight TBD UTC (Epoch timestamp TBD).
+For Bitcoin mainnet, the BIP9 starttime is midnight 15 November 2016 UTC (Epoch timestamp 1479168000) and BIP9 timeout is midnight 15 November 2017 UTC (Epoch timestamp 1510704000).
 
 For Bitcoin testnet, the BIP9 starttime is midnight 1 May 2016 UTC (Epoch timestamp 1462060800) and BIP9 timeout is midnight 1 May 2017 UTC (Epoch timestamp 1493596800).