Six months aren't that much, it's still closer to four than to just three.
[He eyes Kyon, noticing the funny sound he makes. It's not really hard to imagine what the issue is, at least part of it.]
Don't try to reason time flow here by the rules you know, [There's a cat mewling at one of the windows.]. Think of it like a video-game or a movie. You have your life in your world, with your sister and your family, your school and everything, that would be movie 1, one day you pause it, or rather you're forced to pause it. It's not the same as making it stop, and you switch to play a video-game rather than keep watching the movie. When you're tired of the game, you return to the movie, continuing it and everything goes on as normal on it, as if you never paused it.
Basically, Haruhi was taken from a time that for you is in the past, but that time-line stopped moving on while she's here so no one noticed her absence. When she returns she will return to the very second she left, continuing her life as normal... Until April 16th or 18th, time at which you're brought here and meet her before she's returned.
[He actually even tries to make an explanation drawing.]
[Action]
[He eyes Kyon, noticing the funny sound he makes. It's not really hard to imagine what the issue is, at least part of it.]
Don't try to reason time flow here by the rules you know, [There's a cat mewling at one of the windows.]. Think of it like a video-game or a movie. You have your life in your world, with your sister and your family, your school and everything, that would be movie 1, one day you pause it, or rather you're forced to pause it. It's not the same as making it stop, and you switch to play a video-game rather than keep watching the movie. When you're tired of the game, you return to the movie, continuing it and everything goes on as normal on it, as if you never paused it.
Basically, Haruhi was taken from a time that for you is in the past, but that time-line stopped moving on while she's here so no one noticed her absence. When she returns she will return to the very second she left, continuing her life as normal... Until April 16th or 18th, time at which you're brought here and meet her before she's returned.
[He actually even tries to make an explanation drawing.]