Below is a list of events taking place on Saturday for Earth Hour:

NATHAN PHILLIPS SQUARE celebrates Earth Hour with a free concert featuring Suzie McNeil, Crash Parallel, Karl Wolf, The Matt York Band and Samba Squad. The family-oriented all-ages concert is hosted by World Wildlife Fund and the City of Toronto. 7 to 9:30 p.m. City Hall.

OUT OF THE DARK candlelight concert for Earth Hour features the Oakville Children's Choir and the Regent Park School of Music Choir with special guest Jackie Richardson, Canada's first lady of gospel, blues and jazz. 8 p.m. ($15 at 905-844-3972). St. Jude's Anglican Church, Oakville.

ST STEPHEN-IN-THE-FIELDS CHURCH honours Earth Hour with a candlelight dinner featuring a menu of plant-based foods and music by English singer-songwriter Max Cann, who will perform his original compositions and take requests. 7 to 10 p.m. ($12, reservations essential at 416-504-4702). 103 Bellevue Ave.

University of Toronto's acappella group counts down to Earth Hour performing their 2008-2009 season repertoire at The Final Countdown concert, 6 p.m. George Ignatieff Theatre, UofT, 15 Devonshire Place. $8 advance, $10 at the door.

JUBILEE UNITED CHURCH holds a concert of works by Chopin, Debussy and Puccini for piano, cello, flute and soprano and the premiere of Mark Richards The Blackening Landscape during Earth Hour. 7:30 p.m. ($20, $10 students). 40 Underhill Dr. 416-444-8839.

GREENBOROUGH COMMUNITY CHURCH'S candlelight sing-along of choruses, rounds, protest, call and response songs is followed by a group discussion on possible Christian responses to climate change. 8:30 p.m. 2000 Keele St.

GREENHOUSE BY CANDLELIGHT is the second annual Earth Hour open house of Trinity-Bellwoods Community Greenhouse. It will glow by candlelight and hum with music as volunteers show visitors what's growing, how it works and how to get involved greening your community. 8:30-9:30 p.m. Trinity-Bellwoods Park, Crawford & Queen St. W.

HYDRO BLOCK This Toronto Community Housing Corp. community, situated between Beverley and Henry and Cecil and Baldwin Sts., will hold an Earth Hour Campfire Celebration in the courtyard. Even the outdoor park lights will be turned off. Hot chocolate, stargazing, sing-song, recycling information and handouts. The purpose of the event is to raise awareness and encourage good recycling habits.

MAPLE NEIGHBOURHOOD WALK starts at the parking lot of St. Andrew's Presbyterian Church, 9860 Keele St., south of Major Mackenzie Dr., at 8:30 p.m. Participants are encouraged to bring beeswax candles, tea lights or battery-less flashlights. For details, visit www.vaughan.ca 

MOUNT DENNIS WESTON CANDLELIGHT VIGIL will feature music and other activities that will highlight sustainability, public transit and green manufacturing jobs for this priority neighbourhood, with a focus on having the airport link and GO Transit electrified and bringing green manufacturing jobs to the former Kodak site rather than big-box retail. 7:30-9:30 p.m. Beside the tracks at Photography Drive Bridge, west of Eglinton Ave. and Black Creek Dr.

WARD 13 EARTH HOUR WEEK LONG FESTIVAL co-ordinated by Green 13 volunteer organization continues with the Critical Mass bike ride starting at Keele St. and Dundas St. W. Friday at 6 p.m.; free public screening of 'Tales of a Yellow Bike' with director Tina Hahn attending Friday at 7 p.m., Revue Cinema; candlelight walk through High Park Saturday at 8 p.m.; candlelight walk through Bloor West Village Saturday at 8:30 p.m.; rally and candlelit march in the Junction area (Keele & Dundas) Saturday at 8:30 p.m.; candlelight service at Runnymede United Church (432 Runnymede Rd.) Saturday at 8:30 p.m. followed by a community reception 9:30 p.m.. Visit green13toronto.blogspot.com

WOODBRIDGE LANTERN WALK With refreshments, music, speeches and a Green Hero Award presentation. Bring an environmentally-friendly light and your own cup for refreshments. Two starting points at 8:30 p.m.: St. Margaret Mary's Church and St. Peter's Church parking lots. Walk ends at the Woodbridge Pool and Arena parking lot at Highway 7 and Islington Ave. (Parking at Market Lane.) For details, visit www.vaughan.ca .

BIG STRETCH YOGA CENTRE supports Earth Hour and World Wildlife Fund with a fundraising candlelit yoga class. Mar. 28 from 8:15 to 9:30 p.m. ($15, reserve at 416-486-4448). 1560 Bayview Ave., suite 303.

EXTREME FITNESS hosts a public candlelight yoga class to raise Earth Hour awareness and money for World Wildlife Fund. Twelve clubs across the GTA are participating in the one-hour class at 8:30 p.m. Suitable for all ages and fitness levels. Minimum donation, $5, goes to WWF. To reserve a spot call the club closest to you.

FIREFLOW YOGA celebrates Earth Hour with a candlelight yoga class Mar. 28 from 8 to 9:30 p.m. To participate please bring two cans of non-perishable food items.172 Eglinton Ave. E, 2nd floor. fireflowyoga.com

BRITA celebrates Earth Hour giving away 3,600 free pitchers (the equivalent of one for every second of Earth Hour) to help Torontonians switch from bottled to filtered water in refillable containers and reduce waste. Mar. 28 from 4:30 to 9:30 p.m. Yonge-Dundas Square.

BULLFROG POWER FOR EARTH HOUR is Vaughan Mills and the green electrity providers' initiative supporting action on climate change. The shopping centre will turn off lighting at 8:30 p.m. and is purchasing enough clean green power from Bullfrog to match the estimated usage of all Vaughan residents during the one-hour period. Visit their website.

CANDLELIGHT SERVICE OF RECONCILIATION WITH THE EARTH at St. Cuthbert's Anglican Church, Leaside, will mark Earth Hour with prayer, reflection and music. Starts at 8:30 p.m. Visitors are urged to consider walking, carpooling or taking transit to the service. 1399 Bayview Ave., call 416-485-0329 or visit http://www.stcuthbertsleaside.com/.

EARTH HOUR BY CANDLELIGHT is Café Nicole's special candlelit dinner featuring a three course all organic menu and official launch of artist Alexis Jardin's first collection 'World' which will be on display. Mar. 28 from 6 to 10 p.m. ($45, $5 goes to the Rouge Valley Conservation Centre). Novotel Toronto Centre, 45 The Esplandade. 416-860-5151.

FAIRMONT ROYAL YORK participates in Earth Hour by turning off its neon signs and welcoming guests by candlelight Mar. 28 from 8:30 to 9:30 p.m. Guests can also lounge by candlelight in the Library Bar with special Earth Hour drinks. The Toronto landmark is among the 56 Fairmont hotels and resorts that will go dark during Earth Hour.

FAMILY EVENT at Erin Mills United Church, 7:45 p.m. to 9:45 p.m., will feature activities for all ages, games, poster making, etc., in addition to a quiet time of reflection, candle lighting, story telling, a skit, and star gazing. Free and all are welcome. Includes refreshments, but bring your own mug. 3010 The Collegeway, Mississauga, call 905-820-9466 or visit www.emuc.ca .

FOUR SEASONS HOTEL TORONTO invites patrons and guests to observe Earth Hour dining by candlelight Mar. 28 at 8:30 p.m. The hotel is among 36 sister Four Seasons properties who are creating a chain of candlelight dinners circumnavigating the globe. The sequence begins with the Four Seasons Hotel Sydney.

HILTON TORONTO observes Earth Hour with a candlelight reception in the lobby Mar. 28 at 8:30 p.m. and a special organic menu in the Tundra Restaurant. 145 Richmond St. W. 416-869-3456.

ONTARIO SCIENCE CENTRE celebrates Earth Hour with a free outdoor Star Party. Visitors can observe the moon, stars and Saturn through high powered telescopes (weather permitting), enjoy First Nations storytelling and live drumming, see demonstrations on ways of reducing climate change and take part in a StarWatch Challenge to learn how light pollution impacts the night sky. Mar. 28 from 8 to 10 p.m. 770 Don Mills Rd. 416-696-1000 or ontariosciencecentre.ca

SHERATON CENTRE TORONTO supports Earth Hour by turning down the lights and illuminating its waterfall garden with floating candles. In the lobby local artist Riad Jisri will create original Earth Hour paintings by candlelight and a table will be set up for children to make eco-friendly crafts. A donation to the World Wildlife Fund will also be made based on revenue collected from the evening. 8:30 to 9:30 p.m. 123 Queen St. W.

STARGAZERS' GROUP OF MISSISSAUGA has telescopes available for the public to stargaze, weather permitting Mar. 28 starting at 8:30 p.m. JC Saddington Park, Mississauga.

STATION GALLERY amps up Earth Hour with Art in the Dark, an evening of music, food and hands-on art making highlighted by a Jackson Pollock inspired glow-in-the-dark painting. Artist Hailey Yates will guide guests as they collectively work on a large scale canvas while Latin group CASSAVA provides the musical entertainment. Mar. 28 from 7:30 to 10:30 p.m. (advance tickets, $15 highly recommended). 1450 Henry St., Whitby. 905-668-4185.

TWIST & SHOUT hosted by the Ontario Science Centre starts 7:30 p.m. During this Earth Hour event you can generate your own electricity on one of two Disco/Twist Dance Generators that can power-up two CFL light bulbs, a 20-led lamp, transistor radio and small television. 770 Don Mills Rd. 416-696-1000.

UNIVERSITY OF TORONTO'S graduate students in the Department of Astronomy and Astrophysics celebrate Earth Hour with a special nighttime observing session of the blackened Toronto skyline and stars from the rooftop observatory on the 15th and 16th floors of the MP Building (60 St. George St.). 8 to 10 p.m. Free. 416-978-2609.

VIP CANDLELIT DINNER prepared by celebrity chef and green advocate Jamie Kennedy is hosted by Tory's Law firm and World Wildlife Fund - Canada. The event, 7:30 to 9:30 p.m., begins with a speech by WWF president Gerald Butts. 79 Wellington St. W., suite 3000, TD Centre. 416-489-4567 ext. 7704.

Outside the GTA

BARRIE EARTH HOUR MUSIC FESTIVAL offers a mix of contemporary country, rock and world class music Mar. 28 from 6 to 8:30 p.m. Downtown Barrie, outside of Barrie City Hall.

CANDLELIGHT VIGIL for Earth Hour hosted by Peterborough citizens' group Safe And Green Energy at Pickering Nuclear Generating Station (Public Information Centre Entrance). Mar. 28 at 8:30 p.m. Bring a candle to show your support for reneweable energy.

HARMONY SQUARE celebrates Earth Hour with an evening of Darkness and Entertainment featuring Doug the Great stiltwalking while juggling illuminated items, choirs, magicians, trios and games. Mar. 28 at 8 p.m. Downtown Brantford.