While summer doesn’t technically start ’til June 21st, the summer season kicks off today, with the beginning of Memorial Day weekend. And what better way to do that with a music festival featuring a lineup that kicks all 11 kinds of ass over the course of two days and nights at the Boston Calling Music Festival. Tomorrow’s docket includes fun. (above, performing “Some Nights” on Saturday Night Live), the Shins, Marina and the Diamonds, Matt & Kim, Portugal. The Man, Cults, MS MR, St. Lucia and Bad Rabbits. Not to be outdone, Sunday features the National (below, doing “Bloodbuzz Ohio”), Of Monsters and Men, Young the Giant, Andrew Bird, Dirty Projectors, Ra Ra Riot, the Walkmen, Youth Lagoon and Caspian. Pretty great, right? So what are you waiting for? Head directly to Beantown and spend your weekend rocking out.