When does Iran celebrate its new year 2021, which is known as Persian Year “Nowruz or Navroz”?

When does Iran celebrate its new year 2021, which is known as Persian Year “Nowruz or Navroz”?

A. March 10, 2021
B. March 15, 2021
C. March 20, 2021
D. None of these

Nowruz marks the first day of the first month, called Farvardin, of the Iranian calendar. This date mostly falls in March and is usually celebrated on March 21. However, the date can shift either a day ahead or behind based on the movement of the sun and planets. Nowruz falls on March 20 in 2021.