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Ayyám-i-Há is a period of intercalary days in the Baháʼí calendar, when Baháʼís celebrate the Festival of Ayyám-i-Há. [2] The four or five days of this period are inserted between the last two months of the calendar (Mulk and ʻAláʼ). [3]
It used a scheme of nineteen months of nineteen days, with the product of 361 days, plus intercalary days to make the calendar a solar calendar. The first day of the early implementation of the calendar year was Nowruz , [ 4 ] while the intercalary days were assigned differently than the later Baháʼí implementation.
Epagomenal [2] days are days within a solar calendar that are outside any regular month. Usually five epagomenal days are included within every year ( Egyptian , Coptic , Ethiopian , Mayan Haab' and French Republican Calendars ), but a sixth epagomenal day is intercalated every four years in some (Coptic, Ethiopian and French Republican calendars).
Every one of these calendars has a year of 365 days, which is occasionally extended by adding an extra day to form a leap year, a method called "intercalation", the inserted day being "intercalary". The Baháʼí calendar , another example of a solar calendar, always begins the year on the vernal equinox and sets its intercalary days so that ...
The term leap year probably comes from the fact that a fixed date in the Gregorian calendar normally advances one day of the week from one year to the next, but the day of the week in the 12 months following the leap day (from 1 March through 28 February of the following year) will advance two days due to the extra day, thus leaping over one ...
In all but a handful of texts, however, the days are merely numbered as "Day ~ of the Five Days upon the Year". [ 32 ] Ptolemy III 's Canopus Decree was an attempted calendrical reform in 239 BC which would have inserted a sixth day into the intercalary month, but it was abandoned due to the hostility of the priests [ 33 ] and people of Egypt.
The most famous Leap Day tradition comes from Ireland, where women are encouraged to propose to their male fiancées, thanks to a request from St. Bridget in the 5th century.
There is another version where, in addition, the fourth leap day is postponed to year 11 and the last leap day is in the last year of the 30-year cycle. The mean number of days per month in the 30-year cycle is 29.53056 days, or 29d 12h 44m. Six months of 29 days and six with 30 days, plus 11 days of the leap years.
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