A man wears a mask as he takes part in a Catrina event ahead of the Day of the Dead, at Zocalo Square in Mexico City, Mexico October 31, 2018. REUTERS/Henry Romero 

People take part in a procession up the hill of Tlachtga as part of the Flame of Samhain festival, in Athboy, Ireland, October 31, 2018. Samhain is believed to be the ancient precursor to Halloween and marks the end of the old Celtic year and the beginning of the new year where the spirits of the dead are passed onto the next world. REUTERS/Clodagh Kilcoyne 

Visitors enjoy the last night of the Luminale light show in downtown Frankfurt, Germany, March 23, 2018. REUTERS/Kai Pfaffenbach 

Revellers wear masks during the traditional Buso Carnival in Mohacs, Hungary, February 11, 2018. REUTERS/Bernadett Szabo 

A reveller wearing a mask dances near a bonfire during the traditional Buso Carnival in Mohacs, Hungary, February 11, 2018. REUTERS/Bernadett Szabo 

Revellers dressed as devils walk among fireworks during "Correfocs" (fire runs), traditional celebrations in eastern Spain with people dressed as dancing devils while lighting fireworks among crowds of spectators, to mark the end of the local festivities in Palma de Mallorca, Spain, January 21, 2018. REUTERS/Enrique Calvo TPX IMAGES OF THE DAY 

Men dressed in animal costumes, called "kuker", carry torches during a festival in the village of Sirishtnik January 13, 2015. Each winter, thousands of men in many Bulgarian towns and villages take part in traditional celebrations for good health and fertility, wearing masks and costumes made of animal fur. REUTERS/Stoyan Nenov (BULGARIA - Tags: SOCIETY ANIMALS ENVIRONMENT TPX IMAGES OF THE DAY) 

A costumed participant in a Perchtenlauf (Perchten parade) performs in Vienna December 6, 2013. The tradition dates back to a 1,500 year-old pagan ritual to disperse the ghosts of winter. REUTERS/Heinz-Peter Bader (AUSTRIA - Tags: ENTERTAINMENT SOCIETY TPX IMAGES OF THE DAY) 

Carnival revellers are silhouetted as they carry a burning wooden wagon during the traditional Swiss "Chienbaese" celebration in the streets of the town of Liestal, near Basel, February 21, 2010. REUTERS/Michael Buholzer (SWITZERLAND - Tags: SOCIETY) 

A man takes part in the annual bullfight festival in San Jose December 29, 2008. More than 300 bullfighters participated in the traditional end of year bullfight. REUTERS/Juan Carlos Ulate (COSTA RICA) 

A Norway supporter eats pizza as she watches the mixed relay event at the Biathlon World Championship in the northern Italy ski resort of Anterselva February 8, 2007. REUTERS/Giampiero Sposito (ITALY) 

Visitors dressed up as Vikings sail on a Viking boat during the annual Viking festival of Catoira in north-western Spain August 6, 2006. The festival re-enacts Viking raids in this area in the past and is celebrated annually every first Sunday of August. Picture taken August 6, 2006. REUTERS/Miguel Vidal (SPAIN) 

A man dressed up as a Viking shouts during the annual Viking festival of Catoira in north-western Spain August 6, 2006. The festival re-enacts Viking raids in this area in the past and is celebrated annually every first Sunday of August. Picture taken August 6, 2006. REUTERS/Miguel Vidal (SPAIN) 

Visitors dressed up as Vikings sail on a Viking boat during the annual Viking festival of Catoira in north-western Spain August 6, 2006. The festival re-enacts Viking raids in this area in the past and is celebrated annually every first Sunday of August. Picture taken August 6, 2006. REUTERS/Miguel Vidal (SPAIN) 

UP HELLY AA FESTIVAL PARTICIPANTS DRESSED IN COSTUME ARE SILHOUETTED AGAINST
BURNING VIKING GALLEY IN SCOTLAND.

Locals dressed in costume are silhouetted against a burning replica Viking
galley in Lerwick during the Up Helly Aa Festival on the Island of Shetland
in Scotland January 28, 2003. The Up Helly Aa Festival, introduced by men
returning from the Napoleonic Wars of the early 19th century, takes place
annually on the last Tuesday of January. Participants drag the replica
Viking galley through the streets of Lerwick to a designated point where it
is ceremonially burnt. Pictures of the Year 2003 REUTERS/Jeff J
Mitchell