From Fallen London Wiki

Yeah, same question.

Also, was this storylet even available for 3 weeks? Cause it seems it was available for just a few days short of that - around 4 days short. I'm pretty sure I've progressed as the event progressed and did the cultural exchange at most a day after it became available, I didn't take my time, but I still missed it - I've got time the healer in 2 hours. So it seems I was just super unlucky and because my TTH comes at an unfortunate day I just wasn't able to get it no matter what? And since it's 3-4 days short of 3 weeks, does it mean around half the people are in this situation based on luck? Not sure my maths checks out cause it's just super weird. Gotta say, it's extremely frustrating and I really don't like it. If it really does work like that (will know in 2 hours), I think I'm going to mail FBG to make sure it was intended this way.