Walk Across Arizona! Join a campus-wide campaign to increase physical activity. It’s a 16-week program that encourages teams of up to 10 people to walk whenever possible and record their mileage for some friendly competition. Student Union Memorial Center, Ventana Room. $10 to sign up. Noon to 1 p.m.
Planning Your UA Retirement. Part of the SBS/SAC Brown Bag Series. A session for anyone planning to retire from the university system. Noon to 1 p.m. SUMC, Copper Room
It’s Time to See Some Invisible Identities. Part of the ATLAS Leadership Certification Workshop Series. Free. 4-5 p.m. Center for Student Involvement and Learning, SUMC, fourth floor
UA law professors discuss their books. Kay Kavanagh, Paula Nalion and Kenny F. Hegland will discuss their books. Signing to follow. 4:30-6 p.m. UofA Bookstore, lower level
UApresents Martha Graham Dance Company. The company will perform “”Ardent Song.”” There will be a post-performance discussion with UA dance professor Douglas Nielsen. Tickets are available at www.uapresents.org. 7:30 p.m. Centennial Hall
“”Spaceballs.”” Come enjoy Mel Brooks’ classic parody of “”Star Wars.”” Free. 7:30 p.m. Gallagher Theater
The Charles Darwin Experience. Don’t miss this improv comedy. Free. 10 p.m. Wilbur’s Underground, Cellar restaurant
