I might need to confirm whether "One Night Only" is an actual published work or event. Checking online, there are some mentions of a "Harry Potter" all-nighter event in 1999 where J.K. Rowling finished the first book. The event was called "One Night Only" and it was held on June 20th, 1998, but that might be conflating dates. Wait, the first book was published in 1997. Maybe the event was a charity event where some Harry Potter-related activities took place, and Dillion Harper is being referenced in a fan-made context.
Wait, the user might be referring to a piece of fan art or a fan fiction where Dillion Harper is featured in an event called "One Night Only." But the user is asking for solid content, so I need to make sure there's real information about this. Maybe there's a play or a reading where Dillion's story is told in a "One Night Only" format. Or perhaps it's a reference to a podcast episode or a short story that came out as a limited edition.
Alternatively, the user might be referring to a charity event or a fan event that uses the name "One Night Only" in conjunction with Dillion Harper's story as written by J.K. Rowling. Since Dillion's story was added after the main series, perhaps there was a special event where his story was featured.
Alternatively, maybe there's a book or a merchandise item called "One Night Only" that features Dillion Harper from the "Harry Potter" expanded universe. Or perhaps it's related to the "Pottermore" platform where J.K. Rowling added more information about the characters. Dillion Harper is part of that expanded story, right? He's the son of Harry's godfather, Sirius Black, and another sibling, so his story was added later.
Alternatively, the user might be using "One Night Only" as a title for a fan-written story or a fan event, but the user is asking for solid content, so it's more likely they need information on an official event or book. If no concrete information exists, I should note that and provide related information about Dillion Harper and the "One Night Only" event.
I might need to confirm whether "One Night Only" is an actual published work or event. Checking online, there are some mentions of a "Harry Potter" all-nighter event in 1999 where J.K. Rowling finished the first book. The event was called "One Night Only" and it was held on June 20th, 1998, but that might be conflating dates. Wait, the first book was published in 1997. Maybe the event was a charity event where some Harry Potter-related activities took place, and Dillion Harper is being referenced in a fan-made context.
Wait, the user might be referring to a piece of fan art or a fan fiction where Dillion Harper is featured in an event called "One Night Only." But the user is asking for solid content, so I need to make sure there's real information about this. Maybe there's a play or a reading where Dillion's story is told in a "One Night Only" format. Or perhaps it's a reference to a podcast episode or a short story that came out as a limited edition. dillion harper one night only
Alternatively, the user might be referring to a charity event or a fan event that uses the name "One Night Only" in conjunction with Dillion Harper's story as written by J.K. Rowling. Since Dillion's story was added after the main series, perhaps there was a special event where his story was featured. I might need to confirm whether "One Night
Alternatively, maybe there's a book or a merchandise item called "One Night Only" that features Dillion Harper from the "Harry Potter" expanded universe. Or perhaps it's related to the "Pottermore" platform where J.K. Rowling added more information about the characters. Dillion Harper is part of that expanded story, right? He's the son of Harry's godfather, Sirius Black, and another sibling, so his story was added later. The event was called "One Night Only" and
Alternatively, the user might be using "One Night Only" as a title for a fan-written story or a fan event, but the user is asking for solid content, so it's more likely they need information on an official event or book. If no concrete information exists, I should note that and provide related information about Dillion Harper and the "One Night Only" event.