Ninja Science Trivia Week runs from September 21 to September 28, featuring daily trivia questions posted randomly in PF Chat, with a two-hour window announced beforehand. Participants compete for prizes, including PF T-shirts or gift cards for non-U.S. members, with each member eligible to win only once. The trivia questions cover various science topics, and members are encouraged to stay alert for postings at any time. The event is open to all members, including non-gold members, during this week. The trivia has generated excitement and engagement within the community, with multiple winners already announced.