Tuesday is the next day, despite the school year in the United States usually starting on the Tuesday after Labor Day. Labor Day doesn’t seem to exist in this episode. I don’t know why Paris doesn’t simply say “on my desk tomorrow”, which has a more urgent feeling. Perhaps she’s hoping to confuse Rory again, so that she hands it in a week late.
Also, there is no way that the school magazine would publish a thousand word article about a repaved parking lot. Rory’s article would be more likely to be around 200-250 words.