If you could explain the process, it would save lots of time pondering and plugging e, pi, and i into the calculator in random ways to figure out whats going on.
The philosophy and ideals behind the Grad Night movement are interlinked with providing an event that is safe, sober, and spectacularly fun. More than just a party, Grad Night is a commitment by parents, school and the community to conduct a great, once in a lifetime celebration.
Shab-e Yalda or Shab-e Chelleh is a Persian festival celebrated on the longest and darkest night of the year, Yalda is a winter solstice celebration.[rs 1] that is, in the night of the Northern Hemisphere's winter solstice. Calendrically, this corresponds to the night of December 20/21 in the Gregorian calendar, and to the night between the last day of the ninth month and the first day of the tenth month [rs 2] of the Iranian civil calendar.[rs 2] The longest and darkest night of the year is a