Drop Dead Date
  
A drop dead date is a set date in a contract that says "x event had better happen by y date, or else!" Well, except they actually spell out what the “or else” part means...the consequences that will kick in on the drop dead date.
Drop dead dates are called drop dead dates for a reason: no extensions allowed. No amount of whining, crying, or brilliant excuses will save you from a drop dead date. Like...if your job is to diffuse bombs, and you’re diffusing one, but whoops...you didn’t diffuse it on time. Donezo.
It’s best to do what the contract you signed says to by the drop dead date, or else face the consequences, which could include ugly words like “damages” and “liabilities” and “fees.”