These photos show President Vucic serving guests a traditional roast pork.
Among the guests was the Patriarch of the Serbian Orthodox Church, Irinej.
Earlier today, Vucic bestowed decorations on the occasion of the national holiday, addressed the ceremony, and met with representatives of Serbs from Montenegro and Bosnia-Herzegovina.
Bosnian Serbs on Jan. 9 held celebrations to mark the anniversary of the founding of the small entity -- Republika Srpska -- in defiance of Bosnia's top court ruling.
A parade in northern Banja Luka city -- de facto capital of the entity -- started the celebrations, which was supported by the senior members of the Republika Srpska government.
Under the slogan "We won't give up holy places", Serbian Orthodox clergy, right-wing and conservative movements and other citizens marched on Wednesday from the centre of Belgrade to the largest church in the city, the St Sava Church.
During the walk, described as a prayer gathering, traffic in the city centre and the main streets was closed, while the police secured the event.
B92 congratulates the holiday - Christ is born!
Christmas, along with Easter, is one of the two greatest Christian holidays. It is the day when the Christian world celebrates the birth of Christ and when, according to the belief, the spirit of Jesus is omnipresent among people, bringing them peace and forgiveness.