Happy Nowruz (Persian: نوروز, The New Day) is the name of the Afghanistan and Iranian New Year in the Solar Hijri calendar. Nowruz is also referred to as the Persian New Year.
Nowruz marks the first day of spring or Equinox as and the beginning of the year in the Persian calendar.
It is celebrated on the day of the astronomical Northward equinox, which usually occurs on March 21 or the previous/following day depending on where it is observed.
The moment the sun crosses the celestial equator and equalizes night and day is calculated exactly every year and families gather together to observe the rituals.