My college art class is having a gallery showing tomorrow, and the “Arts in Focus Committee” sent me an email reading:

Your artwork cannot be displayed without these signatures, so please sign and return before Monday 11/6. Thank you!

Is it just me, or this sentence extremely vague? Does she mean literally before Monday, such as Sunday night? Or does she mean before the end of Monday?

I think she most likely means that it’s due on Monday, but still, the imprecise language bugs me for some reason. Anyone else?