The first year of high school which usually ends up being an extension of 8th grade (middle school) because everyone's still friends with the same people and are still immature. Also
freshman year tends to be the easiest year of high school because you're not at pressured to or can't take
AP classes. And your core classes are much easier than higher grades. Because you're either 14 or 15 years old you can't drive in most states or get a job which limits your independence to go to parties, go to certain events
etc. Also "upperclassmen" usually dislike freshman which makes it hard to be invited to these events. Overall freshman year isn't quite as exciting as other years in high school.