The fourth annual Beaver Stadium Blue Out will take place this season during the Michigan State game on Nov. 29.

The Blue Out was started by a pair of students to support charities that help victims of child abuse for the last home game of the 2011 season against Nebraska. Since then, it’s become an annual tradition. For the Blue Out, the entire stadium is encouraged to wear blue to raise awareness for the fight against child abuse. Blue is the official color representing that cause, and you can buy the official Blue Out shirt to support Prevent Child Abuse Pennsylvania.

This year, the Blue Out’s organizers are encouraging participants to send tweets to @OneHeartPSU or make a post on their Facebook wall that contains one promise to altruism.

The last two Blue Outs came in game of lesser import against Kent State and Temple in 2013 and 2012, respectively. The game with the Spartans will be a big one — it’s Senior Day, and Penn State’s last regular season game before a bowl game, barring an epic collapse between now and then.