Hijri solar calendar
The solar Hijri calendar is based on the glorious calendar with Hijri origin. The beginning of the solar year is equal to the first day of spring. The Hijri solar calendar is now the official calendar in Iran and Afghanistan. This calendar in Iran was announced as the official calendar of Iran with the approval of the National Assembly on April 3, 1304. The names of the twelve months of the solar calendar in Iran are the ancient Sassanid letters of Emshaspandan and other Zoroastrian gods.
The origin of the solar Hijri calendar, such as the Hijri lunar calendar, is the year of the migration of the Prophet of Islam, Muhammad, in 622 AD from Mecca to Medina. The beginning of Muhammad's migration from Mecca on Monday (1st of Rabi 'al-Awal / 24th of Shahrivar 1 AH) is equal to 13 September 622 AD (Julini) and 16 September 622 AD (Gregory) and Muhammad's arrival in Medina is on the 8th of Rabi' al-Awal of the same year.
The beginning of the calendar
The beginning of the solar calendar on Friday, "April 1, 1 AH" (29 Sha'ban 1 year before the migration) is equal to March 19, 622 AD (Julini) and March 22, 622 AD (Gregory).
Of course, the first day of a solar Hijri year (from April 1 to September 15) is 5 months and 24 days before the Prophet's migration (less than a year).
years, seasons, months and days
This calendar consists of 365 days in the form of 12 months, and according to the glorious calendar, it marks the beginning of the vernal equinox in the Northern Hemisphere. With the difference that its origin is Hijri. The designers of the Jalali Chronicle were a group of mathematicians and astronomers, the most famous of whom was Hakim Khayyam, an Iranian mathematician and poet. They achieved this new calendar by order of the Seljuk king and by modifying the Yazdgerdi calendar. The glorious calendar, by preserving the beginning and length of the year by changing the origin, names and lengths of the months, became a tower in the form of the Hijri solar calendar, and again with changes during the months, while varying their names, became the title of the Hijri calendar.
This calendar is based on the solar equinox, equal to 365 ٫ 24219,788 days; Its calendar year is 365 and 366 days (leap).
Each year has 4 seasons with the letters Spring, Summer, Autumn and Winter, and each season has 3 months, and each month is approximately 4 weeks and each day 7 days with the letters Saturday, Sunday, Monday, Tuesday, Wednesday, Thursday and Friday (Adineh) has it. Each year begins with April 1 and the spring season.
The longest day of the year occurs on July 1 and the longest night of the year occurs on the night of Yalda (from the evening of December 20 to sunrise on January 1). The length of the months of this calendar has varied throughout history and in different countries, but a