Handel's 'Messiah,' performed by Bravo! Vancouver Chorale, 7:30 p.m., St. Anthony Catholic Church, 3618 S.E. 79th Ave. Call 503-771-6039.
Tree-planting leadership training, sponsored by Friends of Trees, 9 a.m. to 3 p.m., Bethesda Neighborhood Church, 109 N. Emerson St. Call 503-282-8846, Ext. 12.
Truth and Lies 9-11 screening, sponsored by Swashy, 7 p.m., Liberty Hall, 311 N. Ivy St., $2-$5, no one turned away for lack of funds. Call 503-737-0607.
Holiday Cheer and Authors' Party, sponsored by Oregon Historical Society, noon to 4 p.m., Portland Art Museum, North Wing, 1119 S.W. Park Ave. Call 503-306-5198.
Traditional Christmas favorites performed on saxophone, flute and guitar by Dennis Marcellino, former member of Sly and the Family Stone and The Elvin Bishop Group. St. Anthony Catholic Church, 3618 S.E. 79th Ave. Call 503-771-6039.
Diabetes Support Group, sponsored by Hollywood Senior Center, 10:30 a.m. to 11:30 a.m., 1820 N.E. 40th Ave. Call 503-288-8303.
Celebration of 54th anniversary of U.N. Universal Declaration of Human Rights, sponsored by Women's International League of Peace and Freedom, 7 p.m., St. Andrew's Church, Community Room, 4949 N.E. Eighth Ave. Call 503-224-5190.
Alzheimer's Caregivers Support Group, sponsored by Hollywood Senior Center, 1 p.m. to 3 p.m., 1820 N.E. 40th Ave. Call 503-288-8303.
Add a New Skip to Your Step: Consider a Knee Replacement, sponsored by Oregon Health & Science University, 1:30 p.m. to 2:30 p.m., Westmoreland's Union Manor, 6404 S.E. 23rd Ave. Call 503-494-0060.
Australian Feminism: What's up down under?, sponsored by Radical Women, talk by activist Brenda Hunter of Geelong, Australia, 7 p.m., buffet at 6:30 p.m. for $6, Bread and Roses Center, 819 N. Killingsworth St. Call 503-240-4462.
Exercise in Fibromyalgia: How it Can Both Help and Hurt, sponsored by Oregon Health & Science University, 7 p.m. to 8 p.m., St. Barnabas Episcopal Church, 2201 S.W. Vermont St. Call 503-494-0060.