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Persian Calendar

Persian Calendar Research

Persian Calendar

The Persian calendar is a 12-month calendar based on the solar calendar. It origins can be traced to the 11th century, when a group of astronomers developed the Jalali* calendar—the original from which today’s Persian calendar evolved.  The Persians were one of the first cultures to develop a solar calendar, and the sun itself is a powerful symbol in Iranian culture.

The Persian calendar of modern time is the result of over two millennia of evolution. It has been repeatedly modified over the course of history, and has been used in its presence form in Iran since 1925. Afganistan also uses the Persian calendar. With the exception of using the Islamic calendar from 1999 ‘til 2002, Afghanistan has used the Persian calendar since 1957.

Counting Days in The Persian Calendar

In the Persian calendar, the year begins at the spring equinox. If the equinox occurs before 12 noon Teheran time, than that day is the first. If it does not, then the next day is the first.

Like the Islamic calendar, years are counted from the time of Mohammed’s emigration to Medina in  622 CE.  The Persian calendar starts at the vernal equinox of that year and is designated as AP 1 (Anno Persico/Anno Persarum, which translates as “Persian year.”

Leap Years in The Persian Calendar

Leap years are years with 366 days between two new year’s days. However, many reject the tradition of basing the calendar on an astronomical observation of the vernal equinox. In order to reconcile their year to one which approximates a tropical solar year, various mathematical calculations have been introduced. The most popular solution to factoring in leap years yields a year length of 365.24220 days, which is closer to a tropical year than the Gregorian calendar’s 365.2425 days.

The Modern Day Persian Calendar

Today’s Persian calendar was legally adopted on March 31, 1925. In this calendar, there is a rule that the first day of year be the first day of spring in “the true solar year.” This version of the calendar also fixes the number of days in each month. Previously, the number of days would vary with the tropical zodiac. This calendar also revived the ancient Persian names for the months. Although Afghanistan also uses the Persian calendar, it substitutes the Afghan Pashto language for the names of the zodiac signs which comprise the months.

*Named for Seljuk Sultan Jalal al-Din Malik Shah I, who officially adopted the solar calendar on March 15, 1079 after the recommendations of a committee of astronomers.

The Persian Calendar vs The Biblical Calendar

Both the Persian calendar and the Biblical calendar have long traditions rooted in astronomical observations, agricultural cycles and the observation of holy days. The similarities end there, with the two calendars having little else in common.

Don Roth, an engineer by profession, has conducted extensive research into the Biblical calendar and its relationship to the Hebrew Calculated calendar. In his free 3-DVD collection, Don explains his mathematical proof for why the Hebrew Calculated calendar is true to the Biblical calendar and can be considered the true calendar of God.

Order your free DVDs revealing Don’s proof today, or to ask a question regarding the Biblical calendar and the Roman calendar.

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