On Sunday night, thanks to the efforts hundreds of volunteers and five months of planning, the Medfield High School Class of 2012 celebrated graduation with the high school's 20th annual All-Night Graduation Party.

"So many [volunteers] have made this great event possible," said Nancy Braverman, co-chair of the All-Night Graduation Party Committee. "Congrats to all the seniors."

This year's theme was games as the Medfield High School cafeteria was decked out with scenes of Las Vegas, or "Med Vegas." 

Planning for the event began in November and the decorating crew started weekly workshops in March leading up to June's graduation.

The purpose of the All Night Graduation Party, according to Braverman, is to provide the graduating seniors a safe environment to celebrate their accomplishments with each other. 

"This party, which provides seven hours of activities, food and fun to celebrate and say goodbye to the high school years in a safe, substance-free environment," she said.

View scenes from the 20th annual All-Night Graduation Party in the photo gallery above.