Take Out the Trash Day - S1-E13
Continuity mistake: This episode takes place in early 2000. 7 or 8 months before the midterm. When Bartlet tells C.J. to drawer the sex education report until after the midterm she exclaims, "next year?"
Take Out the Trash Day - S1-E13
Continuity mistake: This episode takes place in February or March of 2000. Josh and Donna have worked in the White House for 13-14 months, but in the beginning of the episode Donna is asking Josh what 'take out of the trash day' is, when she has been working in the White House for many, many Fridays.
Chosen answer: A really annoying innate lack of sense. My friends and family say the same thing all the time, and I'm endlessly trying to correct them. I think people just don't know any better and (ironically) couldn't care less that they're speaking incorrectly.