Still, most people do it because it's a big accomplishment and it's a good excuse to throw a party afterwards. The Lohans are not most people, though.
When 17-year-old Cody graduated from a Long Island high school, there were a couple of family members that were noticeably absent from the celebration. Sister Lindsay Lohan stayed in London, where she has most recently been living. Then again, we know Lindsay sometimes has trouble getting flights, so maybe it was just a logistical glitch.
As for Cody's father, Michael Lohan Sr., he apparently just couldn't make it work. He tells TMZ he had to skip Cody's commencement because his son was hospitalized with a high fever and baby mama Kate Major is currently behind bars, so he was between a rock and a hard place.
Despite the circumstances, it looks like Cody still had a pretty good day.