In pics: World rings in Christmas, from Tokyo to Patna

The Christmas festivity began with Churches decorated with nativity scenes, brightly lit X-mas trees, colourful lights and singing of carols to commemorate the birth of Jesus Christ.

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People wearing Santa Claus costumes sail along Venice's Grand Canal aboard traditional Venetians boats, Italy.

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Participants dressed as Santa Claus take part in a charity event "Tokyo Great Santa Run 2018" in Tokyo.

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Chefs apply finishing touches to a 56-feet-long Christmas plum cake inside a shopping mall in Ahmedabad, India.

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People dance before the annual Santa Claus city race in Skopje, Macedonia.

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A woman dressed as Santa Claus reacts before the charity run in Moscow, Russia.

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Bollywood actor Aishwarya Rai Bachchan with young cancer patients during a pre-Christmas celebration, organised by Cancer Patient's Aid Association, in Mumbai.

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Girls light candles at the Church of the Nativity, in Bethlehem in the Israeli-occupied West Bank.

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Children dressed as Santa Claus take part in Christmas celebration at a school in Ajmer.

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Children ride a horse sleigh in snowfall in a park in Pavlovsk, outside St.Petersburg, Russia.

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Children dressed as Santa Claus ride on a Tonga during Christmas celebration, in Patna.