On Christmas Eve (24. Dec), norwegians have their meal. Normally "ribbe" and "pinnekjøtt", and some are also eating turkey, "lutefisk" and "rakfisk". Differently from for examle USA and England, norwegians opens their Christmas gifts this night, not the morning the twentyfifth. Many also visits the church.
western norweigians
I assume some Norwegians will ride on a horse drawn sleigh.
a candle
they leave it out for rudolph the red nose reindeer
They light usaully red candles on Christmas eve for a guide that Mary and Joseph are looking for shelter.
A candle.
The white candle that is sometimes used in an Advent Wreath is the Christmas or Christ candle and it lit at the Masses starting with Christmas midnight Mass. Most Catholic Churches use only the 4 violet and rose candles during Advent and the wreath is removed from the church when Christmas decorations are put up on Christmas Eve.
In medieval times a special candle was lit every night of the twelve days of Christmas. The special candle was an Advent candle. Christmas lasted from Christmas Eve until the Epiphany on January 6th.
burn it on Christmas eve to bring prosperity and happiness in the new year
Some people light a candle in the window.
Over here in Ireland, we put a candle in our windows on Christmas Eve and we have a warm welcome to Irish people coming back home.
Traditionally a candle on Christmas eve, but any light today. A welcoming light. To have a light in your window on Christmas Eve to welcome the stranger meant that you were welcoming the Holy Family too. To have no light meant that you shared the guilt of the Innkeeper at Bethlehem who said, "No Room"!