Bircas Hachammah : Blessing of the Sun-Renewal of Creation
Every twenty-eight years, for a few hours on a Wednesday morning in April, throngs of Jews fill streets, sidewalks, rooftops and parks for the most infrequent ritual in Judaism the Blessing of the Sun. The ancient rite marks the return of the sun to the exact place it occupied on the fourth day of Creation on the same day and at the same hour that the sun began to shine in the primordial heavens.
Bleich, J. David, "Bircas Hachammah : Blessing of the Sun-Renewal of Creation" (2009). Books. 14.