Comment by fsckboy
>[1] https://knowyourmeme.com/memes/what-a-week-huh
>"In the episode, the character Liz Lemon, portrayed by Tina Fey, complains to character Jack Donaghy, portrayed by Alec Baldwin, about having finished a hard week of work, with Donaghey reminding her that it is still Wednesday"
I don't know any context beyond what's in this clip of Liz Lemon saying it to Jack https://www.youtube.com/watch?v=1z3uGyBM_1c
but "what a week" by itself does not indicate that the week is over, you can say "what a week" in the middle of a week; it would imply more the multiplicity of things that have already gone wrong, and "it's Wednesday" as a response has the sense "and it's only Wednesday, more things can still happen"
In writing classes, adding all of that unnecessary dialog is considered insulting to the audience. If you are trying to write a joke for the lowest denominator audience member, then you will alienate a larger portion of the audience. If every single joke needed that much additional context, it's not a funny joke. If you're going to require the writers to add that much dialog, you might as well ask them to add a laugh track