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Each year, the Office of Sustainability hosts a variety of annually recurring events and campaigns to help students and others learn how to Make Orange Green.

Arbor Day Celebration

Each year we celebrate both Tennessee Arbor Day and National Arbor Day. Tennessee Arbor Day is the first Friday in March and National Arbor Day is the last Friday in April.

Big Green Friday

Big Green Friday

Putting an environmental twist on Big Orange Friday, wear green to kickoff annual Earth Month celebrations.

Power Challenge

A UT tradition since 2005, the month-long Make Orange Green POWER Challenge is a way for the UT community to demonstrate its commitment to reducing the university’s environmental impact.


Biketoberfest is a week-long cycling “festival” in October of every year. The goals of the event are to highlight cycling programs at UT and in Knoxville, build community among cyclists in Knoxville, and encourage biking as a means of commuting sustainably. Click on the title for a schedule of events for 2022!