The term "bf" commonly stands for "boyfriend." If the question is about when "bf" or boyfriend-related day is celebrated, National Boyfriend Day is celebrated annually on October 3rd.

If the question is related to "BF" as Battlefield (the video game series), the latest Battlefield game, Battlefield 6, is set to be released on October 10, 2025.

Please specify if this clarifies the intended meaning of "bf" or if the inquiry is about a different context.