why do Palestinians pick Tuesdays?

I'm in the midst of organizing a Palestinian film series AND I'm doing an independent study on Palestinian film (along with my friend Tal)). AND, lucky me, it just so happens that there's a filmmaker, Jackie Salloum who will be in town, in the flesh, along with her films, TOMORROW! How lucky I am to have the opportunity to chit chat with a young chic filmmaker and see some films that ILL keeps cancelling on me. But no, I'm not that lucky. I have class then. Sure, class is great, I love class. And it's taught by another one of my favorite professors of all time, Phoebe Gloeckner. And my classmates are all totally awesome, and did I say how much I love class? What do I do? Skipping class in grad school is bad bad bad. But I want to see the movie and meet the hotshot and get some free advice on the film series... Why Tuesday? Any advice would be much appreciated.