On the eve of his birthday, he had said, "Nothing new... This time, I'm in Kolkata and will spend the time with my family."
Ganguly, who represented India in 113 Tests and 311 ODIs, is one of India's most successful captains.
Leading the Men in Blue to the famous Natwest triumph in 2002, he was instrumental in instilling confidence and aggression in the side, a quality Indian teams lacked.
The Board of Control for Cricket in India was early to wish its ex-captain.
"Here's wishing former #TeamIndia Captain @SGanguly99 a very happy birthday. #HappyBirthdayDada," the BCCI posted on Twitter.
"Happy birthday @SGanguly99! Hope you have a #Royal day! #HappyBirthdayDada"
The International Cricket Council also wished the left-hander.
"Happy Birthday to one of @BCCI's finest batsmen of the 21st century, Sourav Ganguly!," it tweeted.
Anil Kumble, who shared the Indian dressing room with him, also wished 'Dada', as Ganguly is fondly called.
"Happy birthday dada @SGanguly99 have a great year ahead! God bless!"
IPL franchises Mumbai Indians and Rajasthan Royals also conveyed their wishes.
"Happy birthday to the man who captained #IND in 49 Test matches & won 21 of them(11 oversea wins). #HappyBirthdayDada," Mumbai Indians posted.
Happy birthday @SGanguly99! Hope you have a #Royal day! #HappyBirthdayDada," was the Royals tweet.