People attend the Los Angeles County Tree Lighting Ceremony in downtown Los Angeles, California, as the Christmas season begins

Pedestrians look at a giant star during Christmas illuminations in a street of Barcelona

Cars pass under Christmas illuminations in a street of Barcelona

Visitors gather around a Christmas tree diplayed at the Spanish Steps, in front of the Trinita dei Monti in Rome

Attendees stand beside an illuminated Art Pavilion at the opening of the Advent Zagreb Christmas market event in Zagreb, Croatia

People take photos of the Christmas tree at the Christmas market at Old Town Square in Prague

The Christmas market at the Old Town Square is pictured in Prague

Visitors walk past illuminated decorations in the Christmas market celebrating its 30th anniversary and displayed for the first time at the Place des Quinconces in Bordeaux, south-western France

People walk past traditional Christmas lights at the Monserrate Mountain in Bogota, Colombia

The Christmas tree is illuminated during a light show at the Grand-Place in Brussels to mark the start of the winter and Christmas period

People take pictures in front of an illuminated Christmas tree at a park in Tokyo's Roppongi district

Aerial view of the traditional Christmas lights in Medellin, Colombia

A pedestrian walks past Christmas lights on the Faubourg-Saint-Honore street in Paris