Guster – the moody acoustic pop rock band you jammed to back in college – officially has its own designated holiday in Massachusetts. Mayor Marty Walsh has named January 15 “Guster Day,” so be sure to don your ratty old flannel and pay your respects to the Tufts-born band accordingly.

The dedicated date arose out of Guster’s involvement with Greenovate Boston, an initiative led by the City of Boston to make Boston a greener and more environmentally efficient place to live. On January 15, Greenovate Boston will celebrate the launch of the Climate Action Plan, an incentive that will culminate a year-long community engagement process, working towards a greener city. Broken down, the goals of the Climate Action Plan are to reduce the city’s greenhouse gas emissions 25 percent by 2020 and 80 percent by 2050.

Mayor Walsh will head the launch celebration, along with the Climate Action Plan “Steering Committee,” a group of 31 neighborhood representatives, private sector heads, academia leaders and City officials that will lead the environmental initiative across the city. Guster will perform during the party held at the Artists for Humanity Epicenter. (The event is unfortunately sold out.)

But, you can still celebrate Guster Day, honoring the trio that was formed in 1992 out of Tufts University. The band has recently released their seventh studio album, “Evermotion,” more than 20 years into their career. Guster got their start in Boston playing local shows before taking to the road to build a reputation among jam band fans – and Greenovate Boston honors the band for their involvement in environmental and public service.

 Image via Tammy Lo/Flickr