Yup. I started my senior year of high school when I was 16. I was 17 when the year ended. Didn't skip a year, just started a year earlier than most people. But, thats another story.
FWIW, I'll be done with undergrad work at college at 21 (assuming I graduate on time next year). Could have finished by this summer (ie: before I turned 21), but, I do enough classwork during the semester, I wanted my summers "off" (read; working/internships instead of classes).
This isn't all that uncommon. The same was true of both my wife and of me; we both have Fall birthdays, and started kindergarten before we turned 5. I turned 18 several months into my freshman year of college.
FWIW, I don't recommend this, but (and I've faced this with my own kids now) there's really not much choice. I was already bored in school; if I'd been back another year, it would've been even worse.
FWIW, I'll be done with undergrad work at college at 21 (assuming I graduate on time next year). Could have finished by this summer (ie: before I turned 21), but, I do enough classwork during the semester, I wanted my summers "off" (read; working/internships instead of classes).