[voice]
It's a little more complicated than that. One of my friends arrived and said it was November 7th when she left, but I left on October 31st. The number of days I'd been here didn't match up with the number of days that had passed back home. It's the same with another friend who's shown up recently. Time spent here and the amount of time that passes back home doesn't match up.
You can even meet people from years into your future, despite only being here for a few months.