Dr. Jeff Conover interviews a girl who is gifted with the ability to calculate past and future days of the week in an instant. During the interview she calculates that July 4, 2113 will be on a Wednesday, and this is confirmed by Dr. Conover. July 4, 2113 will actually be on a Tuesday. The writers evidently did not take into account the fact that 2100 will not be a leap year.
A character in the episode is called Daniel Blake, but narrator Truman Bradley introduces him as Daniel Borden in the voiceover.