World Photography Day is observed worldwide on 19 August every year. This year marks the 176th anniversary of the first permanent photographic process released to the world.
The concept of celebrating photography originated after the French government presented daguerreotype process "Free to the World", invented by Joseph Nicèphore Nièpce and Louis Daguerre, as a gift to the world on 19 August, 1839.
World Photography Day was launched globally as a project in 2010 by Australian photographer Korske Ara.
Check out some of the photographs captured in 2015 that define the world we live in. Apart from some joyous events, the photos depict the devastating moments suffered by people worldwide in 2015.
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Same-sex couples kiss their partners after their marriages in Miami, Florida on 5 January 2015Reuters 
Supreme Court Legalizes Gay Marriage in all 50 States of USReuters French gendarmes and police inspect a large piece of plane debris which was found on the beach in Saint-Andre, on the French Indian Ocean island of La Reunion on 29 July 2015 to determine whether it came from Malaysia Airlines Flight MH370, which vanished last year in one of the biggest mysteries in aviation history.Reuters 11-year-old girl collects food for pigs at landfill dumpsite outside Siem Reap.Reuters 
Prince William and Duchess of Cambridge, appear with their baby daughter, Charlotte Elizabeth Diana, outside the Lindo Wing of St Mary's Hospital, in London, Britain May 2, 2015.Reuters A malnourished child lies in a bed at a hospital in Yemen's capital Sanaa July 28, 2015.Reuters Burnt cars are seen near the site of the explosions at the Binhai new district, Tianjin on 13 August 2015. Two huge explosions tore through an industrial area where toxic chemicals and gas were stored in the northeast Chinese port city of Tianjin, killing at least 44 people.Reuters A hand is seen as Iraqi forensic teams recovered dead bodies from a mass grave in the presidential compound of the former Iraqi president Saddam Hussein in Tikrit on 6 April 2015.Reuters 
People search for family members trapped inside collapsed houses a day after an earthquake in Bhaktapur, Nepal on 26 April 2015.Reuters 
Villagers try to pull the bodies of victims from the rubble after a hillside collapsed onto a house at Laden village, west of Srinagar.Reuters Australia's captain Michael Clarke (C) celebrates with team mates as they pose with the Cricket World Cup trophy after they defeated New Zealand in the final match at the Melbourne Cricket Ground (MCG) March 29, 2015.Reuters Hindu priests pull a chain of wooden beds which are tied through the flooded banks of river Ganga after heavy monsoon rains in the northern India caused the rise in water levels, in Allahabad, India.Reuters
