Edhi, who founded the world's largest volunteer ambulance network, would have been 89 on Tuesday.
Abdul Sattar Edhi founded the world's largest volunteer ambulance network in Pakistan, the Edhi Foundation.
Unlike wealthy individuals that fund charities in their names, Edhi dedicated his life to the poor from the age of 20, when he himself was penniless in Karachi.
The reach of Edhi's foundation grew internationally, and in 2005 the organisation raised $100,000 in aid relief for the victims of Hurricane Katrina.
Edhi was born before partition in Bantva, Gujarat, India on February 28, 1928.
He died last year in Karachi of renal failure. He was offered treatment abroad, but insisted on being treated in a government hospital at home.
The Edhi Foundation's slogan is: "Live and help live".
Today would have been his 89th birthday.
In his honour, Google changed its logo in the United States; Iceland; Portugal; Australia; New Zealand; Japan; Estonia; the UK; Denmark; Ireland and Pakistan to a doodle, or illustration, of Edhi.
Google hailed Edhi's "super-efficient" ambulance service.
"In celebration of Abdul Sattar Edhi, let's all lend a hand to someone in need today," it said.
The technology giant's team has created more than 2,000 doodles for homepages around the world. Among those recently celebrated are Pramoedya Ananta Toer, Fred Korematsu and Edmonia Lewis.
"The doodle selection process aims to celebrate interesting events and anniversaries that reflect Google's personality and love for innovation," the company says.
'No religion higher than humanity'
With more than 1,800 ambulances stationed across Pakistan, the Edhi Foundation is Pakistan's largest welfare organisation. In 1997, the foundation entered the Guinness World Records as the "largest volunteer ambulance organisation".
Value is the only commonality in an increasingly complex, challenging and interdependent world.