When Is Yalda 2025. Shabe yalda (شب یلدا), or the night of yalda, is a persian festival celebrated on the longest and darkest night of the year in the northern hemisphere i.e., the night of the winter solstice. Rooted in zoroastrian traditions , this night symbolizes togetherness, poetry, and hope as iranians welcome the symbolic victory of light.
In the solar hijri calendar. Yalda is a winter solstice celebration;