Veteran American journalist Katie Couric has revealed that she suffered a frightening neurological episode on 27 June while attending the Aspen Ideas Festival in Colorado, during which she was temporarily unable to recall the current month, year and president. Writing in a Substack post titled "The Day I'll Never Remember," she said she believed it was 2024 and that Joe Biden was still president, and she has no memory of the two public panels — on artificial intelligence and journalism — that she took part in that day. The episode is notable because it briefly mimicked the warning signs of a stroke, prompting emergency medical attention.

Couric's husband, John Molner, who was present, described how she seemed "not all there" and repeatedly asked the same questions, such as why she was in hospital. Doctors initially checked for a stroke, but an MRI scan showed no signs of one; she was ultimately diagnosed with transient global amnesia (TGA), a sudden, temporary bout of memory loss that prevents the formation of new memories and can erase some recent ones. According to the Mayo Clinic, TGA is not caused by stroke, seizure or head injury, usually resolves completely within 24 hours, and is typically a "one and done" event. Couric said she began feeling like herself again at around 9pm and went to sleep at 2am, though the episode leaves a permanent gap in her memory.