[header] How to persuade your parents into letting you go to a late night event [title] Set the stage. [step] Timing is key in popping the question, so you'll want to put some thought and effort into when and how you'll do it. Wait for a moment when you know your parents will be relaxed and happy, and ask them then. 
[substeps] Don't ask your parents if they're in a bad mood. Wait till later when they've cooled off.