There’s been some chrono-slippage due to webcomics time and the timeskip between SGR and Bad Machinery, but even at their oldest (right after that timeskip) the mystery kids wouldn’t have been born before late ’97… Lottie not ’til July ’98. I was figuring it was about 1994 here, from Shelley’s age, but there was a poster for Be Here Now, which didn’t come out until 1997.
That reminds me, I need to add this one to the timeline. And the new partial bobbins.horse one, if I can figure out where it goes.