https://youtu.be/dS_mT4sDg3c
We have celebrated Yalda night (the longest night) for more than 4 thousand years. In the past our ancestors celebrated this night to welcome brightness. Indeed the next day (from the first day of winter season) days are getting longer and nights are getting shorter. Our ancestors thought that the sun is born in this night. It was said that the Evil which darkness is fighting with God which is Brightness (and
sun). And we are in fact supporting God to defeat the Evil in this
آی-ویدئو