Challenge by: reminiscent-afterthought
They can mean a lot of things. Like the seven dwarves in Snow White, or the seven trustees in The Keys to the Kingdom, or the regular seven days of the week. Even that last one can be interpreted in different ways: a week? Or some other prompt?
Both actually. :) Does anyone know the poem: Monday's Child? Below is the snippets relating to their days.
The Days of the Week
The other catch? You write a fic a day (or do a piece of art a day) for a week...and not just any day, but the day that corresponds to the "theme/prompt". Ie. you write Monday's poem on Monday etc. Though you don't have to necessarily start on Monday. Once you start, you follow the order though, otherwise you can't finish in a week.