The Bahá'í calendar is a solar calendar used in the Bahá'í faith comprising 18 months, with four or five
intercalary days each year. The New Year is at the northern Spring equinox,
corresponding to 21 March on the Gregorian calendar. Ayyám-i-Há is specified as month 20.
Usage
bahai_date(
major = integer(),
cycle = integer(),
year = integer(),
month = integer(),
day = integer()
)