CN Tower
Date Colour Occasion
Ongoing Red and White Top of the hour CN Tower light show
January 26 Light Blue and Yellow World Alzheimer Day
February 4 Orange and Blue World Cancer Day
February 14 Red Valentine 's Day
March 17 Green Saint Patrick 's Day
March 21-June 20 Decreased Lighting Bird Migration - Lighting is decreased during spring bird migration
September 23-December 20 Decreased Lighting Bird Migration - Lighting is decreased during autumn bird migration
December Red and Green Season 's Greetings
December 1 Red World AIDS Day
December 6 Purple White Ribbon Day
December 10 Yellow Human Rights Day
December 21 Blue and White First Day of Winter
December 31 Countdown to 2021 and Light Show New Year 's Eve
Lighting
The CN Tower illuminated in the colours of the French flag in memoriam to the November 2015 Paris attacks The CN Tower was originally lit at night with incandescent lights , which were removed in 1997 because they were inefficient and expensive to repair . In June 2007 , the tower was outfitted with 1,330 super-bright LED lights inside the elevator shafts , shooting over the main pod and upward to the top of the tower 's mast to light the tower from dusk until 2 a.m . The official opening ceremony took place on June 28 before the Canada Day holiday weekend . The tower changes its lighting scheme on holidays and to commemorate major events . After the 95th Grey Cup in Toronto , the tower was lit in green and white to represent the colours of the Grey Cup champion Saskatchewan Roughriders . [ 47 ] From sundown on August 27 , 2011 , to sunrise the following day , the tower was lit in orange , the official colour of the New Democratic Party ( NDP ) , to commemorate the death of federal NDP leader and leader of the official opposition Jack Layton . [ 48 ] When former South African president Nelson Mandela died , the tower was lit in the colours of the South African flag . When former federal finance minister under Stephen Harper 's Conservatives Jim Flaherty died , the tower was lit in green to reflect his Irish Canadian heritage . On the night of the attacks on Paris on November 13 , 2015 , the tower displayed the colours of the French flag . Programmed from a desktop computer with a wireless network interface controller in Burlington , Ontario , the LEDs use less energy to light than the previous incandescent lights ( 10% less energy than the dimly lit version and 60% less than the brightly lit version ) . [ 49 ] The estimated cost to use the LEDs is $ 1,000 per month . During the spring and autumn bird migration seasons , the lights would be turned off to comply with the voluntary Fatal Light Awareness Program , which `` encourages buildings to dim unnecessary exterior lighting to mitigate bird mortality during spring and summer migration . `` [ 50 ]
The CN Tower (French: Tour CN) is a 553.3 m-high (1,815.3 ft) concrete communications and observation tower located in Downtown Toronto, Ontario, Canada. Built on the former Railway Lands, it was completed in 1976. Its name CN originally referred to Canadian National, the railway company that built the tower. Following the railway's decision to divest non-core freight railway assets prior to the company's privatization in 1995, it transferred the tower to the Canada Lands Company, a federal Crown corporation responsible for real estate development. The CN Tower held the record for the world's tallest free-standing structure for 32 years until 2007 when it was surpassed by the Burj Khalifa and was the world's tallest tower until 2009 when it was surpassed by the Canton Tower. It is now the ninth tallest free-standing structure in the world and remains the tallest free-standing structure on land in the Western Hemisphere. In 1995, the CN Tower was declared one of the modern Seven Wonders of the World by the American Society of Civil Engineers. It also belongs to the World Federation of Great Towers. It is a signature icon of Toronto's skyline and attracts more than two million international visitors annually.