ONLINE: WATERWISE GARDENING Learn how to grow an ecologically friendly...

ONLINE: WATERWISE GARDENING

Learn how to grow an ecologically friendly garden without sacrificing beauty, which plants thrive with little supplemental irrigation and how to care for your xeriscape garden, 7 to 8 p.m. Monday, hosted West Babylon Library, free, register for a link at wbab.suffolk.lib.ny.us, 631-669-5445. Credit: Getty Images/Ronnie Kaufman

Many listed events are virtual; please call ahead before going to any event.

SOCIAL SUPPORT FOR SENIORS

Volunteer call-based companion coordination that connects social work students with those in need of social interaction for weekly phone calls, 10 a.m. to 5 p.m. Mondays through Fridays throughout August, Brentwood Library, 34 Second Ave., Brentwood, free, register at giftsofgab.org, 631-346-6052.

INTRO TO CONSUMER REPORTS

Learn how to find a wide variety of product reviews using Consumer Reports, no experience is necessary, 10 to 11 a.m. Tuesday, hosted by Farmingdale Library, 116 Merritts Rd., Farmingdale, free, register at farmingdalelibrary.org, 516-249-9090.

ONLINE: INTRODUCTION TO WEB-BASED GENEALOGY

Learn how to find information online about your family history, review test results and more, 7 to 8:45 p.m. Tuesday, hosted by Peninsula Library, free, visit peninsulapublic.org for a link, 516-239-3262.

BENEFITS OF VOLUNTEERING

Learn how volunteering can change your life and how you can get involved, 2 to 3:30 p.m. Tuesday, Smithtown Library, 1 Church St., Kings Park, free, Suffolk County cardholders can register at smithlib.org, 631-360-2480.

ONLINE: FIRE ISLAND — EXPLORE THE SALT MARSH

A Fire Island National Seashore park ranger explores vegetation with its extensive root systems that enable them to withstand brief storm surges and buffer storm impacts on upland areas. Learn about the salt marshes, which are nursery grounds for fish and valuable habitats for wading birds and waterfowl, 7 to 8 p.m. Tuesday, hosted by Commack Library, free, Suffolk County cardholders can register at commackpubliclibrary.org, 631-499-0888.

TRUSTEE AND EXECUTOR ROLES

Learn about estate planning and the responsibilities of being named as an executor or trustee, 5:30 to 6:30 p.m. Tuesday, East Hampton Library, 159 Main St., East Hampton, free, register at easthamptonlibrary.org, 631-324-0222.

SUPPORT GROUP FOR CAREGIVERS OF RELATIVES

Informal support for caregivers of elderly relatives, bring your questions and ideas, 7 to 8 p.m. Tuesday, Port Washington Library, 1 Library Dr., Port Washington, free, register at pwpl.org, 516-883-4400.

ONLINE: FAMOUS LONG ISLAND SHIPWRECKS

Discover Long Island shipwrecks, including the Prins Maurits carrying colonists to what would become Delaware, the HMS Culloden wreck of the American Revolution, the Mexico and Bristol carrying immigrants during the early 1800s, the fire that destroyed the steamship Lexington in 1840, the sinking of the USS San Diego in World War I and the loss of the tugboat Gwendoline Steers in a 1962 winter storm, 1 p.m. Wednesday, hosted by East Meadow Library, free, register to attend in-person or online at eastmeadow.info, 516-794-2570.

ONLINE: EYE HEALTH THROUGH THE YEARS

Learn how to care and protect your eyes at every age, 2 to 3 p.m. Wednesday, hosted by Oceanside Library, free, visit oceansidelibrary.com for a link, 516-766-2360.

PORTRAYALS OF U.S. PRESIDENTS IN FILM

Learn how television and the movies have portrayed some of our presidents, sometimes correctly and other times incorrectly, 2 to 3 p.m. Thursday, Syosset Library, 225 S. Oyster Bay Rd., Syosset, free, syossetlibrary.org, 516-921-7161.

ONLINE: DON’T FORGET — THE SCIENCE OF MEMORY

Learn about the history of memory, how we know what we know and how we forget more than remember, learn the different types of memory and practical tricks to remember more, get practical real-world strategies to keep your brain healthier, 7 to 8:30 p.m. Thursday, hosted by Glen Cove Library, free, register for a link at glencovelibrary.org, 516-676-2130.

ONLINE: COOKING DEMONSTRATION

Learn how to make beef and broccoli tacos, 7 to 8 p.m. Thursday, hosted by Sachem Library, free, register for a link at sachemlibrary.org, 631-588-5024.

SENIOR DISCUSSION GROUP

Meet new friends and neighbors in a casual discussion, 10 to 11:30 a.m. Thursdays through Aug. 25, Westbury Memorial Library, 445 Jefferson St., Westbury, free, register at westburylibrary.org, 516-333-0176.

ONLINE: HEALTHY LIVING FOR YOUR BRAIN AND BODY

The Alzheimer’s Association discusses the habits that you can develop now to keep your brain healthy and possibly delay the onset of cognitive decline, noon to 1 p.m. Thursday, hosted by Westhampton Free Library, free, register for a link at westhamptonlibrary.net, 631-288-3335.

ONLINE: GREAT TV THEME SONGS

Learn behind-the-scenes stories of several classic TV themes, including “Seinfeld,” “Star Trek,” "Hill Street Blues," “M*A*S*H,” “Gilligan’s Island," “I Love Lucy” and more, 2 to 3 p.m. Thursday, hosted by Oceanside Library, free, visit oceansidelibrary.com for a link, 516-766-2360.

TITANIC SITES

A New York City tour guide shares Titanic history, including details about the victims and survivors, scandals, Titanic pop culture, monuments to the disaster and the former Pier 54, 7 to 8:30 p.m. Friday, Sachem Public Library, 150 Holbrook Rd., Holbrook, free, register at sachemlibrary.org, 631-588-5024.

CARING FOR WILDLIFE

Sweetbriar Nature Center discusses what to do if you find an animal that might need help, plus meet some of the nature center’s resident non-releasable animals, 10 a.m. to noon Saturday, The Smithtown Library, 148 Smithtown Blvd., Nesconset, free, Suffolk County cardholders can register at smithlib.org, 631-360-2480.

 With Daniel Variano and Keri Wall-Treudler