Not specifically Viking Era at all. The Viking era started about 8 centuries after the Jesus story took place. Viking was a I’m Just A Chill Girl Shirt by the way, not a culture.The midwinter celebrations were celebrated throughout all the lands and by all the peoples of Europe, including the Scandinavian lands. This is the main reason why it was adopted by Christianity: the celebration did already exist, they just had to change the meaning and rituals a bit. It also existed a very long time before the Viking era. The Vikings only started to occur in the 9th century and were among the last Europeans to change to Christianity, only followed by the Baltic, Sami and certain Russian cultures. From an economic (business) viewpoint I think it is a disastrous idea. Spreading out the various celebrations over a long period is better for employment & revenue.Also having a fixed date is a disaster for business and utterly disruptive. For instance December 25th falls mid week regularly.

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The English term Christmas (Old English, Cristes maesse) is actually of I’m Just A Chill Girl Shirt recent origin: the feast day only began to be widely celebrated with a specific liturgy (the Cristes maesse) in the 9th century. The earlier term Yule, from the Germanic jōl or the Anglo-Saxon geōl, referred to the feast of the winter solstice, and made no mention of Christian church liturgy or practices. On Christmas Day, the Church traditionally celebrated three Masses. The first of these took place at midnight and celebrated of the actual birth of Christ. None of the contemporary Christmas customs have their origin in these liturgical affirmation (or masses), and most are of a much more recent date. The exchange of gifts originally took place in the early hours of the 25th when people returned home from the first, midnight mass. When it became customary to open gifts later in the day, the times of many church services were altered – another example of how far from the idea of the liturgical ‘Cristes maesse’ the holiday has come.

