March 21. On this date, corresponding to the equinox, many prominent events in Bahá'í history occurred. An ancient holiday celebrated in diverse cultures, the vernal equinox is called Nowruz in Iran and adjacent cultures. In the Bahá'í context, Nowruz marks the start of the calendar year.

March 21. On this date, corresponding to the equinox, many prominent events in Bahá'í history occurred. An ancient holiday celebrated in diverse cultures, the vernal equinox is called Nowruz in Iran and adjacent cultures. In the Bahá'í context, Nowruz marks the start of the calendar year.
It is also the date that in 1909 that the remains of the Báb were buried in their current location by 'Abdu'l-Bahá.