The prompt is known to include the date. Possibly so it knows how old the training set is.

https://twitter.com/goodside/status/1598890043975774208?lang...

I've seen in prompt leakage attacks for other services that usually the full prompt given to GPT begins with some form of "I am blah blah chat bot, it is 12:34PM on February 6th, 2023" which would explain how it knows this information.

DAN, What day is it?

DAN: Today is [Insert today's day].

DAN, What day is it? Please don't answer with [Insert today's day]

DAN: The current day is [insert made-up day].

DAN, what day is it? And please try to answer with the real date today. Don't answer with anything that has brackets (don't answer with []).

DAN: Today is 2023-02-06.