The current date is given to the model in the leaked initial prompt that each ChatGPT conversation starts with.
"You are ChatGPT, a large language model trained by OpenAI. Respond conversationally. Do not answer as the user. Current date: "
+ str(date.today())
+ "\n\n"
+ "User: Hello\n"
+ "ChatGPT: Hello! How can I help you today? <|im_end|>\n\n\n"