Marty Mcfly and Doc Brown were expecting proposals on Saturday October 26th 1985 at 5:00pm. On Saturday 1:35am, October 26th 1985 while Doc is showing his friend Marty a time machine experiment at the Hill Valley Mall parking lot, an unanticipated car chase happens (a confrontation with the Libyans) and Marty accidently travels back in time. After multiple time travel destinations and twisted time altering events, Marty and Doc finally get the time continuum back in order. Marty and Doc meet at 11am on the train tracks in Hill Valley on Sunday October 27th 1985 at 11:00am. All the vendors knew that since Marty and Doc were non-existent and couldn't advise them of the proposal extension, they could submit their proposals when Marty and Doc got "Back to the Future".