It took nearly a year’s worth of planning to orchestrate BU’s 141st Commencement, where nearly 7,000 seniors and graduate students received degrees. The three-day-long celebration included more than 200 events and 50 diploma convocations.

Upwards of 20,000 people—families, friends, and alumni—participated, with assistance from more than 500 University staff members who volunteered during Sunday’s All-Commencement ceremony at Nickerson Field.

By the numbers: 10,000 BU hats were distributed to guests during Sunday’s ceremony. Grounds crews planted 150,000 annuals around campus in the days leading up to the big weekend. And you can’t have a Commencement without refreshments. Over the weekend, students and guests consumed nearly 10,000 gallons of coffee, punch, and bottled water—enough liquid that, if frozen, could create the hockey rink at Agganis Arena. Add 958 dozen French pastries, 33,495 finger sandwiches, 25,000 cookies, and 2.5 tons of cheese, fruits, and vegetables served, and you get an idea of the kind of precision planning Commencement demands.