I am just gonna say that most plots in Star Army run in what is called 'Comic Book Time'. For example, notice how Batman has been solving crimes since 1938, yet is still in his mid-thirties? At the same time, Gotham City has been dealing with topical issues all the while and having Christmas every year. Meanwhile, Batman remembers something Two-face said to him three years ago very well because it was only about thirty issues ago and he might've even still been dealing with the same missing little girl who given actual passage of time should now be missing teenager with an odd fascination for Justin Bieber.
Now, let's apply this to Star Army. For three days of real time, the Sakishima crew lived in a virtually constructed Old West. That took us about nine weeks to write and flesh out (Jan 22-Mar 26). We got into that trouble on the way back from our Christmas Party (two days of in-character time) which was shortly after a rather dramatic night-before-Halloween (one night of in-character time). The crew has probably lived a total of (including timeskips) three written months together TOPS, and at the same time we've been writing them for over a year-- a year in which we've encountered the changing seasons with them, dealt with the greater issues of the meta-plot, and made it home in time for Christmas Dinner.
Now, you have to ask yourself: "How does that even work?" What you don't have to do, though, is answer that question. In fact, trying to with anything other than the phrase, 'Comic Book Time' is only going to make your head hurt.
Another good handwave is 'It's always Summer on Hanako's World!' and you'll find it printed on some of your travel brochures, I'm sure.