17.
I’m not sure why so many people ask “do you feel any different?” on your birthday. Seems like a silly question to me. Why would I suddenly wake up and feel different just because my age has been incremented? Humans are, by nature, curious beings. As such, we often seek explanations and answers to events that we can observe around us. Age and time are something we created to explain why things occur the way they do (I would say “over time”, but that would defeat the point of my argument). Time is simply an arbitrary value. By extension, age is as well.
