Heartland, you’re breaking ours. One of the friendliest all-ages DIY venues in the city is shutting down, but they aren’t going out quietly. To celebrate all the fond memories, the curators are throwing an all-day festival of music and revelry (and maybe pancakes!), featuring a gobsmacking lineup of excellent local talent. Dance, cry, and hug all the friends you’ve made there, then start plotting your own underground art gallery/party haven. (Heartland, noon, $5 suggested donation, all ages)