A soft spring breeze arrives, and the earth breathes again. The branches that stayed quiet during winter now show small green buds. Nowruz is not only the start of a new year; it's also the start of hope and a new chance to see the simple beauty of life. Tables become colorful, hearts feel closer to each other, and time seems to give us a new page to write a new story.
Nowruz reminds us of a simple but deep truth: life can grow again, even after cold and silent days. Spring comes to tell us that hope always finds a way to return.
History of the Solar Calendar:
The Solar Calendar is one of the most accurate calendar systems in the world. Its roots go back to ancient Iran.
Ancient Iran:
During the Achaemenid and later the Sassanian periods, people in Iran used a solar calendar based on the movement of the sun in the sky. The festival of Nowruz was celebrated at the time of the spring equinox even in those early times.
Reform during the Seljuk period:
In the 11th century, Sultan Jalal ad‑Din Malik Shah asked a group of great astronomers, including Omar Khayyam, to improve the calendar. Their work created the Jalali calendar, which became one of the most accurate calendars in history.
The modern Solar Hijri calendar:
In the 20th century, Iran adopted a national calendar based on the same scientific ideas of the Jalali system. The starting point of the calendar is the migration (Hijra) of the Prophet Muhammad, but the years are calculated using the movement of the sun and the exact moment of the spring equinox.
Why is the solar calendar very accurate?
A real solar year is about 365.2422 days.
The Iranian calendar corrects this difference by using leap years. The new year also begins exactly at the astronomical spring equinox, not on a fixed date.
Advantages of the Solar Calendar:
• Very high accuracy; it is even slightly more accurate than the Gregorian calendar.
• Perfect connection with the seasons; Nowruz is always at the start of spring.
• Based on real astronomical calculations.
• A clear structure of months: the first six months have 31 days, the next five months have 30 days, and the last month has 29 or 30 days.
Disadvantages of the Solar Calendar:
• The leap‑year system is more complex than in the Gregorian calendar.
• It needs astronomical calculations to determine the exact start of the year.
• It is not widely used around the world and is mainly used in Iran and Afghanistan.
Interesting fact:
The Iranian calendar is so accurate that its error is about one day in several thousand years, while the Gregorian calendar has an error of about one day in 3300 years.
New Spring, New Year, New Life
Seyed Hamed Vahedi
Fri, 20 March, 2026