Mad Men creator Matthew Weiner is notoriously tight-lipped about his show, and that's never been more true than for the highly anticipated season five premiere this Sunday. He's barely let anything slip, and we've all been on the edge of our seats wanting to know something—anything!—about what's in store for us. (We have had to wait a year and a half since the last episode.) But now it appears he's had to reveal one detail that he would have rather kept under wraps: the year the premiere episode is set.

In an interview with Salon's Willa Paskin on Sunday, Weiner specifically said he didn't want people to know what year the premiere was taking place in:

I don't want you to say the year! I really don't want you to say it. I'd like for people not to know about that.

Well, now he's been forced to reveal that this season begins in 1966—all because of a very small error he made. After critics were given early copies of the premiere episode, it came to his attention that the song played over the closing credits, Dusty Springfield's "Look of Love," actually came out six months after the time in which the episode takes place. He sent a note to the journalists explaining his mistake and saying he'd picked a new song "more suited to the time period." Wow, that is some serious attention to detail—which probably explains why everything in that show is so perfect.

Anyway, "Look of Love" was released on January 29, 1967. So that puts the start of season five in the late summer of 1966. The last season left us somewhere in 1965. Hmm. I, for one, am relieved he didn't decide to skip too many years in between—since I don't want to miss a second of these people's lives. (Umm, maybe I should go outside for some fresh air and interact with some other people for a few minutes...) Still, plenty of very dramatic things could have happened in the interim. Though this slip-up probably pains Weiner the Secretive, of all the details we could have learned, the year certainly isn't the most salacious. But we'll take what we can get. And, thankfully, we only have a few more days to go until we can see for ourselves what we have in store for us.

'Mad Men' changes premiere song after critics complain [Entertainment Weekly]
Matt Weiner: "Mad Men" is about today [Salon]