Professional Referral Organization of Sonora, 7 a.m., Perko's Cafe, Sonora, 533-5044.
Railtown 1897 State Historic Park volunteer work day, 9 a.m. to 3 p.m., Fifth Avenue and Reservoir Road, Jamestown, 984-3953.
Tuolumne County Museum volunteer work day, 9 a.m. to noon, museum annex, Lower Sunset Drive, Sonora.
Senior Legal Advocacy, 10 a.m. to noon, 14855 Mono Way, Suite 103, East Sonora, 588-1597.
Summerville Parent Nursery School parents' meeting, 6:30 p.m., Arastraville School, Tuolumne Road North, Tuolumne, 928-4288, 586-7666.
Calaveras County Board of Education, 4:30 p.m., Calaveras County Schools Office, 185 S. Main St., Angels Camp.
Toughlove, 7 p.m., bus drivers' lounge, Calaveras High School, 350 High School St., San Andreas.
Calaveras Croakers Toastmasters Club, 8 to 9 a.m., HRC Child Care Resources' Conference Room, 584 West St. Charles St., San Andreas, 754-4242.
Arnold Library story hour, 11 a.m. to noon, Arnold Library, 1065 Blagen Road, Arnold, 795-1009.
Story time for children, 11:30 a.m. to noon, Murphys Volunteer Library, 480 Park Lane, Murphys.
Preschool story hour, 11:45 a.m., Arnold Library, 1065 Blagen Road, Arnold, 795-1009.
Grandparents and Books, 2 to 4 p.m., Calaveras Central Library, 891 Mountain Ranch Road, San Andreas.
(For arts and entertainment listings, see Weekend Thursdays. The Union Democrat Calendar attempts to list all non-commercial events of public interest in the Tuolumne and Calaveras county areas. Contributions are welcome. Call The Union Democrat, 588-4541, visit the office, 84 S. Washington St., Sonora, or e-mail us at: firstname.lastname@example.org .)