A "midnight launch" refers to an event or activity that takes place at midnight, usually to mark the release or start of something, such as a new product, game, or movie. Full definition
As a video game journalist, I don't often attend midnight launches for video games anymore. (retrovolve.com)
Approximately 15,000 midnight launch events will take place around the world with countless retailers. (seekingalpha.com)
I thought we'd post this show prior to the 3DS midnight launch so you could get some more info on the games you should play, and the games you should ignore! (gonintendo.com)