– Manuscript – Welcome to English in a Minute! You already know that there are seven days in a week. But what is the "it" in this expression? Speaker A: Jonathan, I've been working on this project for the past fifteen hours! I am…so…tired.Speaker B: 15 hours?! I think you should call it a day, Anna.Speaker A: I can't stop now, Jonathan. I must get this done.Speaker B: … [Read more...] about Call it a Day (Idioms)