I'm planning to give a speech in Russian where I'll say something like "imagine there's an eighth day of the week--let's call it ______."
Представьте, что прибавился еще день недели--назовем его восьмятница.
What I'm struggling with is how to make up a name for the eighth day in a way that rings true for Russians in order to make the illustration more memorable. However, I know I'm in dangerous territory as what a non-native speaker makes up as logical may not be what a native speaker would think of.
What would you name the eighth day of the week? I would like to incorporate the number eight somehow.