Hello! The jam end date was pushed back a month, from the end of February to the end of March. I normally do this every year because it means that people don't have to stress out to meet a deadline - the jam is just for fun and not judged so I don't want anyone to be having a bad time.
Submissions will mostly come in towards the end of the jam, I haven't really noticed a reduced amount of interest this year - it all seems pretty normal!