"Proof." 2 p.m. Sheas 710 Theater, 710 Main St. 847-1410. sheas.org/710main. $35. A daughter coping with her father's mental illness and subsequent death finds herself questioned when a groundbreaking mathematical proof is found within her home.
Sabres vs. Islanders. 3 p.m. KeyBank Center, 1 Seymour H. Knox III Plaza. 855-4100. keybankcenter.com. $43-$154. Cheer on the Sabres as they take on the New York Islanders on home ice.
A Taste of Jazz. 4 p.m. Water Street Landing, 115 N. Water St., Lewiston. 754-9200. waterstreetlanding.com. $20-$25. Sample delicious food and listen to some cool jazz at this annual event. Cash bar and auction will also be featured.
Queen City Roller Girls: Lake Effect Furies & Subzero Sirens Mashup. 4 p.m. Buffalo Riverworks, 359 Ganson St. 342-2292. buffaloriverworks.com. $15-$20. Witness an epic roller derby match between not one, but two Queen City Roller Girls teams.
Acid Dad and Honduras. 7 p.m. The Waiting Room, 334 Delaware Ave. 853-5483. waitingroombuffalo.com. $10-$12. Punk and indie rock collide in these two groups, who have earned acclaim from the likes of CMJ, Nylon, NME, and Rolling Stone.