TO DO TODAY

— 7:30 p.m., Mohegan Sun Arena; $39-$79; 1-800-745-3000. — 8 p.m., Katharine Hepburn Center, 300 Main St., Old Saybrook; $30-$40; 1-877-503-1286. — 8 and 10:30 p.m., Comix at Mohegan Sun; $15-$35; 1-800-7453000.

— 7:30 and 10:30 p.m., Foxwoods’ Grand Theater; $52$65; 1-800-200-2882.

— 7:15 p.m., Eugene O’Neill Theater Center, 305 Great Neck Road, Waterford; reading of a new play about loyalty and truth in adult friendships; part of the National Playwrights Conference; $30; (860) 443-1238.

— 7:30 p.m., East Lyme High School, 30 Chesterfield Road; East Lyme Regional Theater; $17, $12 seniors and students; 501-1456.

— 8 p.m., Wilcox Park, 44 Broad St, Westerly; Colonial Theater production; free; (401) 596-7909.

— 8 p.m., Granite Theatre, 1 Granite St., Westerly; $20, $17 seniors, $12 children; (401) 596-2341.

— 3 and 8 p.m., Goodspeed Opera House, 6 Main St., East Haddam; $76-$81; (860) 873-8668.

— 8 p.m., Ivoryton Playhouse, 103 Main St., Ivoryton; $50 adults, $45 seniors, $22 students, $17 children; (860) 767-7318.

— 7 p.m., Connecticut River Museum, 67 Main St., Essex; performance by Flock Theatre; $18, $12 museum members, $10 children 12 and under; (860) 767-8269.

— 8 a.m.5 p.m., Old Lyme Historic District, Lyme Street; food, vendors, art and more to celebrate the town’s cultural heritage; free; parking at Lyme-Old Lyme High School and Old Lyme Marketplace; oldlymemidsummerfestival.com.

— 10 a.m.-5 p.m., Old Saybrook Town Green, 302 Main St.; (860) 388-3266.

— 11 a.m., tour departs from the Stonington Farmers Market, 1 High St., Stonington; $15 adults, $12 members, seniors, active military and students; (860) 535-8445.

— 3-5 p.m., Savoy Bookshop and Cafe, 10 Canal St., Westerly; Jones signs “Aesop Takes Ominous for a Walk,” his Sour Grapes coloring book; free; (401) 213-3901.

— 6-8 p.m., McCook’s Beach, Niantic; music and Arthur Murray Studios dancing demonstrations to benefit restoration projects at the Sam Smith House; $20 donation; (860) 442-1292.

— 10 a.m., Denison Pequotsepos Nature Center, 109 Pequotsepos Road, Mystic; drop-off program for ages 4-12 to look for animal tracks, play outside and be adventurous; free for New London County residents; (860) 536-1216.

— 10 a.m., Groton Public Library, 52 Newtown Road; for grades 4 and up; bring sneakers and a water bottle; free; (860) 441-6750.

— 10 a.m., Stonington Free Library, 20 High St.; for all ages; free; (860) 535-0658.

— 11 a.m., Savoy Bookshop and Cafe, 10 Canal St., Westerly; with Jill Austin, author of “Where Did All the Rs Go?”; free; (401) 213-3901.

— 2-7 p.m., Camp Harkness, 301 Great Neck Road, Waterford; open house event with live music, train rides, crafts and more for all ages; sponsored by the Camp Harkness Fund; $5; (860) 443-7818.