Midnight tolling of bells, decked up Christmas trees, long row of candles and carols sung in unison marked Christmas celebration across the country, as the faithful thronged churches to offer prayers and exchange gifts.
The celebrations began late Wednesday night with worshipers congregating at churches and cathedrals.
Men draped in red and white and dressed as Santa Claus was a common sight, and traditional Christmas carols rendered the air festive with gospel bands enthralling the merry-makers with songs like 'Jingle Bells', 'Oh Holy Night' and 'Santa Claus Is Coming to Town'.
Pope Francis led the Christmas Eve mass in the Vatican calling for "tenderness" and "warmth" after a violence-plagued year as millions of Christians began marking the holiday.
The Argentine pontiff's brief homily was replete with Gospel references in his Christmas Eve mass, broadcast live in 3D for the first time.
"Do we have the courage to welcome with tenderness the difficulties and problems of those who are near to us?" the pope asked in Saint Peter's Basilica, filled with some 5,000 worshippers.
"Or do we prefer impersonal solutions, perhaps effective but devoid of the warmth of the Gospel? How much the world needs tenderness today!" he said.
The leader of the world's 1.2 billion Roman Catholics also called on "the arrogant, the proud... (and) those closed off to others" to meet life "with goodness, with meekness."
Prime Minister Narendra Modi too extended Christmas greetings to everyone around the world and hoped the festival will enhance the spirit of harmony, peace and brotherhood in the society.
"Merry Christmas to everyone around the world. May this day enhance the spirit of harmony, peace and brotherhood in society," he said.