I always thought of it as each unit of time being relatively shorter in relation to your life on earth. A year is 20% of the time a 5-year old is aware of, but

I always thought of it as each unit of time being relatively shorter in relation to your life on earth. A year is 20% of the time a 5-year old is aware of, but only 2% of a 50-year olds life. But the boredom argument is pretty strong. I remember vividly the time when I moved to another country and those first three months still feel like they lasted longer than the last three years.