LORELAI: Well, first, he asked me to the David Bowie concert next week.
David Bowie’s 2002 concert tour was the Heathen tour, promoting his latest album Heathen, which came out in June that year. It opened in New York City on June 11, before going back and forth through Europe and the US.
By October 11, Bowie was back in New York, with the final concert in the city being Sunday October 20 at the Beacon Theatre on Broadway [pictured]. That is the last possible date Lorelai and Peyton could have gone to his concert – and if that was the week after their first date, it suggests that this scene takes place around the second week of October.
There is no way that this tallies with the timeline within the show, way too much has happened for it only to be early October, so it’s probably best to think of it as a fictional concert date. On the rare occasions when real world events are mentioned as impinging on the action, they rarely match up exactly with the dates within the show. But I think it is safe to say it is now late October, so they only seem to be running about two weeks behind the real world.
The Annotated Gilmore Girls 