Introduction of two new permanent calendars: Solar Hijri and Lunar Hijri Introduction and review

Machine summary:

Whereas permanent calendars determine the days of the week, days of the month, the month, and the year over very long periods reaching up to several thousand years (Sharh-e Taqavom-haye Mokhtalef va Mas'ale-ye Kabise-haye Jalali, Taqi Riahi, Tehran, 1335, page 5) (2)-The Solar Hijri chronology with Iranian month names, as is common today, has officially become prevalent in our country from Tuesday, 11 Farvardin 1304 Solar Hijri, corresponding to 1343 Lunar Hijri and 1925 AD (Articles of the late Seyyed Hassan Taqizadeh, Volume 1, Tehran 1349, pages 189-190)- Solar Hijri Permanent Calendar The Solar Hijri permanent calendar includes two tables, No. 1 and 2, and each consists of seven parts. It should be noted that the famous starting point of the Jalali chronology, as will be explained later, is the year 471 Lunar Hijri (Sharh-e Bisht Bab Mulla Zafar Gonabadi, authored by Abd al-Ali Birjandi, Tehran edition, part four of the second chapter, and the book Si Fasl by Khwaja Nasir al-Din al-Tusi, sixth chapter, Tehran 1330 Lunar Hijri, and Katlen, History of Iranian Literature, authored by Professor Jalal al-Din Homai, second edition, Tehran 1340, page 445 -440 and the book Chronology in Ancient Iran, authored by the late Seyyed Hassan Taqizadeh, Tehran 1316, page 175 -167 and the book Twenty Articles by Taqizadeh, Tehran 1346, pages 126-197)q (1)- The leap years of the Solar Hijri chronology, which are calculated based on the Jalali chronology, do not have a fixed form unlike the Julian and Gregorian chronologies.