Did you see the folks promoting 'Columbus Music Day'? These are not them.

City Council recently designated April 21 as “Columbus Music Day.”

For two nights beginning on Friday, April 20, Cafe Bourbon St., Dirty Dungarees and Spacebar will play host to Fly Under Fest, which features a load of appropriately underground bands whose members were far more likely to be spotted around back peeing on City Hall at the moment the resolution was signed than anywhere near the gallery.

On Friday, Pittsburgh punks Killer of Sheep headline Bobo alongside Yesterday's Youth, the locals in Minority Threat, whose seven-track, eight-minute explosion, Culture Control, was among my favorite Columbus releases of 2015, and Nukkehammer, a crusty hardcore band whose song titles (“Soviet Rust Belt”) occasionally serve as fitting descriptors of its blistering sound.

The lo-fi howlers in Raw Pony kick off the music Saturday at Dirty Dungarees, followed by the dreamy, drugged out Headroom and equally patient Omaha songwriter David Nance, whose desert-landscape-traversing tunes sound at once world-weary and wizened. Next door at Spacebar, a pair of New Orleans-based bands, Trampoline Team and Enoch Ramone, will join local scuzz pugilists Bloody Show and DANA, recently back from a whirlwind tour promoting its excellent new cassette, Chaos Promo, a sonic buzz saw that veers from cryptic, spacious passages to funhouse explosions given an added jolt by livewire singer Madeline Jackson.