The official schedule for the AP 100 Bands You Need To Know SXSW Showcase is as follows: 
 

Outside (Tilly’s Stage)
12:30-1:00 - Crown The Empire
1:15-1:40 - Davey Suicide
1:55-2:20 - Upon This Dawning
2:35-3:00 - Allison Weiss
3:15-3:40 - Forever Came Calling
3:55-4:25 - Twin Falls (featuring Chris Carrabba)
4:40-5:05 - Young Guns
5:20-6:00 – Frank Turner & The Sleeping Souls

Inside (McNally Smith Stage)
12:15-12:40 – Pentimento
12:55-1:20 – Air Dubai
1:35-2:00 – Foreign Tongues
2:15-2:40 – HRVRD
2:55-3:25 – What’s Eating Gilbert
3:40-4:05 – Single Mothers
4:20-4:45 – Masked Intruder
5:00-5:40 – Andrew W.K. (special solo show)

The all-day party is free, admits all-ages and open to the public!