Sonora City Council, 5 p.m., City Hall, 94 N. Washington St., Sonora.
Columbia Volunteer Fire Department, Engine Co. No. 1, 6 p.m., Columbia Firehouse, Jackson and Bigler streets, Columbia.
Yosemite Foothills Fire Safe Council, 6 p.m., Groveland Library meeting room, Main Street, Groveland.
Summerville School PTSA, 6:30 p.m., school library, 18451 Carter St., Tuolumne, 928-4291.
Middle Ages discussion group, 7 p.m., Tuolumne County Library, 480 Greenley Road, Sonora, 533-5507.
Sonora Grange 705 and Sonora Grange Youth, 7 p.m., Sonora Youth Center, 732 Barretta St., Sonora, 532-9201, 962-7775.
Professional Referral Organization of Sonora, 7 a.m., Perko's Cafe, Sonora, 533-5044.
Twain Harte Community Services District, Water and Sewer Committee, 8 a.m.; Safety Committee, 10 a.m., Twain Harte Community Services District office, board room, 22933 Twain Harte Drive, Twain Harte, 586-3172.
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 Board of Supervisors, 9 a.m., Tuolumne County Administration Center, supervisors' chambers, fourth floor, 2 S. Green St., Sonora.
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.
ATCAA Food Bank distribution, for people 60 and older, 10 a.m. to noon, Tuolumne County Senior Center, 540 Greenley Road, Sonora, 533-2622.
Retired Public Employees Association, 12:30 p.m., Pine Tree Restaurant, Mono Way at 19601 Hess Avenue, East Sonora, 928-3456.
Sonora Union High School District Board of Trustees, 5:30 p.m., Babe Michel Library, Sonora High School, 430 N. Washington St., Sonora.
Tuolumne County Master Gardeners, 6 p.m., Tuolumne County Senior Center, Greenley Road, Sonora, 533-5696.
Summerville Parent Nursery School parents' meeting, 6:30 p.m., Arastraville School, Tuolumne Road North, Tuolumne, 928-4288, 586-7666.
Golden Heritage District, Boy Scouts of America, 7 p.m., Tuolumne County Sheriff's Posse clubhouse, 19130 Rawhide Road, Jamestown, 984-4881.
Muir Trail Girl Scout leaders, 7 p.m., cafeteria, Soulsbyville School, 20300 Soulsbyville Road, Soulsbyville.
Tuolumne City Memorial Museum, 7 p.m., museum, Carter Street and Bay Avenue, Tuolumne, 928-3516.
Vietnam Veterans of America, Chapter No. 391, Board of Directors, 7 p.m., Veterans Memorial Hall, 9 N. Washington St., Sonora, 532-2052.
"Fireworks on the Water," 9:30 p.m., Lake Don Pedro. Arrival before 8 p.m. is recommended.
Angels Camp Business Association, 6 p.m., Camps Restaurant, Greenhorn Creek Golf Course, 736-0049.
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.
Calaveras County Board of Supervisors, 9 a.m., supervisors chambers, Government Center, 891 Mountain Ranch Road, San Andreas.
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.
Emergency Assistance Relief Services, 5 p.m., Job Connection Calaveras, Angels Camp, 754-3571.
Angels Camp City Council, 6 p.m., Angels Camp Fire Station, 1404 E. Highway 4, Angels Camp.