Deadline vs Dateline

You want to get this right once and for all.

No more getting confused deadline with dateline

Deadline is when the time limit is up. It is the cut-off point or the date when you have to finish your thesis, project or manuscript. If you don't submit your project by the deadline, you're dead meat.

Dateline is a line at the head of a newspaper article showing the date and place of writing. If you miss it, so what? You can still read the news.