Someone was talking about this on 9to5mac. So I went to look and found it. In System Preference/Touchpad go to notification center and you can see the date Oct 14, at 9:41am So I'm saying the keynote is oct 14, at 9am pacific time. Apple always post the date they announce it. Look at IOS8 on the Sep 9 keynote for example. It even has the same TIME! Tweet It Now (@ItTweetitnow) says: "OS X Yosemite launching October 14th. Spoiled in System Preferences > Trackpad > Notification Center." http://9to5mac.com/2014/09/30/apple-releases-os-x-yosemite-gm-candidate-1-0-for-developers/ .