At 10:45 p.m. -- WHERE Backyard Stage

Technically there isn’t a headliner Thursday, since the main stage opens Friday. But everyone knows the unofficial opening headliner is Two Door Cinema Club.

The Irish dance-punk trio has a number of jams to get the crowd bouncing off the walls, including the carefree “What You Know.” There’s also the stress-relieving “Undercover Martyn” and the laidback “Sun.”