What is THE MAIN SIGNIFICANCE of the day and time as seen in the deadlines for each quiz (even though an incorrect meme seems to pop up every now and then saying otherwise)? (Ignore the seconds) (edited at 3:31 pm, October 14, 2015 (CDT))
Original question: What is THE MAIN SIGNIFICANCE of the day and time as seen in the deadlines for each quiz (even though an incorrect meme seems to pop up every now and then saying otherwise)?
The day and time Marty, Doc and Jennifer arrive in 2015. (We will accept clear knowledge equivalents as long as it mentions some sort of time travel and 2015. For good measure, we'll also take "Back to the Future Day.").