It's really a matter of who's going to catch your typos. If you use the constant built into your language, millions of people are looking at it. If you type t

It's really a matter of who's going to catch your typos. If you use the constant built into your language, millions of people are looking at it. If you type them into your throwaway bash script, nobody is going to notice you typed 60 * 60 * 24 * 356 to get a year's worth of seconds.