It means someone may have a day modifier: https://wiki.mafiascum.net/index.php?title=Day_(modifier). Usually a Dayvig, but in context of his other comment about somebody knowing something, it could also mean that one of the investigative roles was given a day modifier.
IMO this alone doesn't change anything. We're still best off to not lynch unless we get more useful information in the next week and a half (jeez lol).
I agree with no lynch being the best option here, especially with a good chance that town is half or more than half power roles.