Cultural Oddity Moment #3

In America you can't always tell who's in high school and who's in college. There's not that much developmental difference between a nineteen and eighteen year old. Sometimes the seniors look old, sometimes the freshmen look young. Here, however, there is no mistaking it. Due to compulsory military service, there is a two year age gap everywhere in society. You don't see 19 and 20 year old people on the subway, the sidewalks, or in the restaurants. Two years is enough time to make a big enough difference that you never don't know who's in what division. It's obvious.
This has been your cultural oddity moment of the day.