Happy Birthday, Lauren!

2Nkn2VyWa30 Happy Birthday, Lauren! is an easter egg in Halo 3. It is hidden in the campaign mode's loading screen.

Overview
To access the easter egg, simply change the Xbox 360's date to Christmas day (i.e. 25th December or 12/25/2024). Then proceed to loading any campaign level and press both thumbstick down. The loading screen would start up but from a different angle, showing a scrolling message reading, "Happy Birthday, Lauren!"

The text was added to the loading screen by Adrian Perez.