Toby Keith and Zac Brown Band are among the singers, actors and athletes featured in the 2011 USO "Moments That Matter" photo calendar, according to Country Aircheck.

You can plan your month of March underneath a photo of Toby in the midst of staging an impromptu concert for troops in South Korea.

Flip to the month of August and you'll see a picture of Zac Brown Band performing for airmen and soldiers at Kirkuk Air Base in Iraq.

The wall calendar is free, but donations to the USO are greatly appreciated.

Just write to: USO, PO Box 96322, Washington, DC 20090-6322 or call 888-484-3876.