@Topgub I would disagree that Yule and other ancient festivals are 'secular' as ancient gods/goddesses are involved.
According to what I read Yule is one of the oldest winter solstice festivals, with origins among the ancient Norse thousands of years ago. Its roots are complicated and difficult to trace, although there are several theories about how and why the festival was celebrated. It is generally agreed that Yule celebrations began as a Norse festival called Jol, although assessments of the purpose and traditions vary. Like most winter solstice festivals, themes of light, fire, and feasting are common threads. Some historians think that sacrifices were an important part of the observance, either to the gods (such as Odin) and other supernatural beings (such as elves) or to the dead or both.
It seems that the Winter Solstice is the same as Yule.
Winter solstice has also been known to celebrate Earth's regeneration or rebirth, and the Scandinavian Goddess, Beiwe, is associated with health and fertility.
The Roman Saturnalia festival was dedicated to the god Saturn
The Diwali festival takes place over five days. The first day, Dhanteras, is for celebrating Lakshmi, the Hindu goddess of wealth, prosperity, youth and beauty.
So I can't see that any of these festivals are 'secular'???