The first story in Retcon: A Mosaic Story!

Scientists involved in a secret research program investigating time travel meet a time traveler, who tells them that no information (neither people nor messages) is coming from any point beyond April 4, 2031, at 3:56 in the afternoon… the time known as "zero second".

I should say the audio, and the reading, are a bit shaky in the first half. I will try to upload some fixes when I get a chance. In the meantime, bear with me; the second half is better. If it drives you too crazy, try the ebook (at least for the first half).