We used to have a Perfect Calendar which we lost, don’t ask me when and how, but the Bundahish explains how it was, in simple language.There are no codes or parables. It is based on pure science and our ancestors are known for their wisdom and science. We all agree that along the way, our present Calendars got messed up. So why argue, let’s understand what the Bundahisn says and reconstruct it.
Let’s recognize this, “That the Calendar cannot regulate nature, it is nature that can regulate the calendar.”
The SOULS of the departed that our dear Mobeds worry about are now part of the universe they now follow the clockwise precision in nature and not our three man-made calendars, none of which are synchronized with nature.
Bundahishn 25:25:
The ‘vehizaki’ month Farwardin, the month Ardwahisht, and Hordad compose the season of SPRING.
The month Tir, the month Amordad, and the month Shahrewar are of SUMMER.
The month Mehr, the month Aban, and the month Adar are of AUTUMN;
and the month Day, the month Vohuman, and the month Spandarmad are of WINTER.
So here are the Seasons and how they work with clockwise precision.

Please Note that Seasons are not of equal length.

SPRING has 92.8 days
SUMMER has 93.6 days
AUTUMN has 89.9 days
WINTER has 88.9 days
Now according to Bundahisn, every season is divided into 3 months.
So starting from the Vernal Equinox the first 3 months comprising the Spring season get 31 days each and the Summer Solstice happens on the 94th day and is the first day of Summer, the first day of Tir.
The 3 months of  Summer starting from the Summer Solstice again get 31 days each and on the 187th day, we have the Autumnal Equinox and the start of Autumn, and the first day of Mehr.
The 3 months of Autumn get 30 days each and the Winter Solstice happens on the 277th day and is the start of winter and the month of Dey.
The 3 months of Winter share the remaining days, so Dey & Bahman get their 30 days each and Espand gets whatever is left before the Vernal Equinox
which usually ends up with 29 days but once in four years it gets 30 days. The year that gets the 30 days is again decided by the Vernal Equinox and is not based on any agreement.
This calendar which we call the MAZDAYASNI CALENDAR is recognized as the Persian Calendar from the 2nd millennium BCE. (that means from the time of Zarathushtra 1738 BCE). Which they say needs no correction for 110,000 years and is the PERFECT CALENDAR. Click to check it out.

Listen with your ears to the best

Consider with open mind

From among the paths

Before deciding

Person by person for his own self


Before greatness of the message

Is truly spread understand each one

Zarathushtra – Gatha – Yasna 30.2 (FR)


  • Fariborz Rahnamoon
  • Fariborz Rahnamoon
    Some dear friends raised a few questions regarding the Naming of Days so here below is a general explanation. ================================================== PHILOSOPHY BEHIND NAMING THE DAYS IN THE MONTH ==========================
  • You must to post comments

Gday Fariborz – Thanks a lot for your enlightening topic. Read it with great interest. Am sure others around the globe will find it of interest also. Do keep posting topics of interest to create the awareness required. We hope many others will take up such discussions also and follow your initiative

  • You must to post comments

It is time we Zoroastrians worldwide accept a single valid calendar for our Global Religion. Zoroastrians are spread across most continents. In our fast changing environment, it is best if we start focusing our traditions to be in line with the ongoing culture & technology. This calendar has been recognized by TimeAndDate.com as the PERSIAN Calendar from the 2nd Millennium BCE.

The souls of our departed relatives do not follow any calendar. They have moved on beyond our worldly physical realm. Religious calendars help us humans on this earth, remember when to perform specific rituals on an annual basis. Can anyone prove how a calendar relates to the betterment of the souls of our departed relatives? Let bygones be bygones and now move on with the current times, re-embracing a calendar that makes logical & technological sense with our times.

Thank you Fariborz Rahnamoon for highlighting this practical aspect of our universal religion.

  • You must to post comments

Thanks Mr. Rahnamoon for your efforts. It is really appreciated. Ahura Mazda bless you (Yazdan Panah Baad)

  • You must to post comments

Thank you Mr. Rahnamoon. Does Bundahishan say anything about the practice of naming days of months after yazads/amshapands?

  • You must to post comments

How will this calendar work for those Zarathushtis in the Southern Hemisphere ??

  • Fariborz Rahnamoon
    Dear Arzan The good thing about the Mazdayasni Calendar is that it is controlled by nature that is the Equinox’s and Solstice’s which happens all over Earth at exactly the same time. So they will celebrate all the festivals exactly at the same time as the northern hemisphere but with opposite season. So Now Rooz will be in Autumn and Mehregan in Spring. Just like they celebrate Christmas in Summer.
  • You must to post comments

Gday Rustom, Behnam, Pouya & ArZan – Thanks for your comments. Please inform your friends and family to read and enquire. Do start discussions on other subjects also. When we communicate and share knowledge, everyone benefits. Enjoy life . Firoz Pestonji

  • You must to post comments

Some friends had some questions about the Naming of the Days so here is a general explanation. Hope it is satisfactory.




The Gathas the ancient teachings of Zarathushtra, is all about Wisdom (Mazda), for the word Mazda appears 164 times in the Gathas. No other word has been repeated as many times as Mazda.

The ancient Iranians were true to the Gathas, their culture was based on Wisdom. In the ancient world, they were known for their wisdom, the Bible acknowledges that over and over again. They studied nature and copied it, for they recognized that truth was in Asha. Superstition and fantasy cannot be part of Asha and we do not find any of it in the Gathas. The Gatha does not promote a Belief, it promotes the Truth, it promotes the use of Wisdom, it promotes Research, it teaches how to progress towards Perfection. It shuns Belief and Tradition but promotes Culture. For Culture is progress and Tradition is stagnation.

Therefore, if a Zarathushti practice is based on superstition it should be considered null and void. If a practice is based on wisdom, then that practice should evolve with the increase in knowledge and information. If a practice based on wisdom does not keep up with the progress in knowledge it becomes a tradition, and tradition is stagnation.

The Persians introduced various systems to help enhance the use of Wisdom. The practice of naming the days of the month introduced during the Sassanian period seems to have been based on Wisdom. Although in times of weakness superstitions values have been attached to a few of the names by personifying them, but the majority are free of superstitious. So, with the help of modern research lets endeavor to rediscover the embedded science in this ancient practice, the science that was lost to atrocities committed against the Zarathushtis to the point of their annihilation.

The National Science Foundation in the US has come to the conclusion that a regular person has about 70 thousand thoughts in a day. The result is a waste of the brain power. None of the thoughts can mature because the mind has less than one second to delve on each thought.

That is where the ancient practice of meditation comes in to clear the clutter. When one sits in front of the flickering flame and concentrates on it, the mind gets relaxed. When one prays in a language that one does not understand that process is quickened. It slows down the mental activity until the mind gets to a meditative stage also known as the Alpha stage. In the Alpha stage, the mind is known to solve complex problems and be innovative.

Recently science has realized that if a group of people, over a period, collectively think about a single subject or single problem, or a single project, they can find solutions and advance in their research at a faster pace. Many hi-tech companies have started to put this into practice.

The Mazdayasni Zarathushtis were aware of this mental downside and had a solution; they named the days to promote a unified thought and action during each day. For example, on days named Peace, Life, Moon, and Good Thoughts, “Life” is revered by not slaughtering animals and not eating meat. The collective action of not slaughtering and not eating meat on four specified days had a dual effect, one on the health of the population and two it helped preserve the animal species.

Naming the days, Water, Wind, Fire, Justice, Victory, Love; were not to ask for boon and blessings from them but to work towards preserving and promoting them. Just like, today we have Earth Day, Mothers Day, Fathers Day, Independence Day, Labor Day, Veteran’s Day etc.

In this scheme, the first seven days of the month are named after the Amesha Spentas, a reminder of the Gathic path to Perfection (28.3), Immortality (28.10) and Spirituality (28.4).


Truly, the Asha (Ultimate Truth) (2) derived

By the Good Mind (1)

Never before known

Among the wise and all creation

With it, make Good Rules (3) and never waning

Increasing Righteousness (4)

Leading us towards Perfection (5)

Zarathushtra – Gatha -Yasna Ha 28.3 (FR)

And those who are righteous are known for

Good deeds and use of the wise mind

In a righteous way in tune with Wisdom in Existence

Their aim achieved

Their desire assuredly happiness

 Their Reward knowledge, and being known as righteous,

faithful and are praise worthy (6)

Zarathushtra – Gatha – Yasna HA 28.10 (FR)

Truly, the spiritual result is exalted (when)

Goodness leads to harmony in thoughts

Which results in good deeds

In harmony with the Wisdom in Creation

As long as we have will and strength

So long we will teach to strive for Truth

Zarathushtra – Gatha -Yasna Ha 28.4 (FR)



1- BAH MAN – Good Mind– Use your Good Mind to inquire and learn the

2- ARDIBESHT – Ultimate Truth- the Laws of Nature- Use them to make

3- SHAHRIVAR- Good Rules – Good Laws- Good Products – Which will lead to

4- ESFAND- Lawful Desire – Righteousness – that will pave the way toward

5- KHORDAD- Perfection – Mental, Physical and Spiritual – which will lead to

6- AMORDAD- Immortality –(a) In Death being remembered for your good work for generations

                                                        (b) In Life by losing the fear of Death –resulting in oneness with

7- AHURA-MAZDA – The Creator of Wisdom – Khod Ah
                                          through Self Realization- KHOD = Self       AH = to come.


The Amesha Spentas are followed by reverence to Fire, Water, Sun, Moon, Rain Star, and Life. This group seems to be made up of those elements that affected their daily life. In those days, the star Tir / Tishtrya was an important guiding star and so was the moon.

The third group is formed to promote and revere Love, Hearkening, Justice, Progressive force, Victory, Peace, and Wind. These are things that are felt just like the wind.

The fourth and the last group leads to enlightenment and is formed by Conscience, Recompense, Truth, Sky, Earth, Divine Words, Enlightenment.

Thus, the collective thoughts and deeds of a population, with respect to that what is named for the day, combines and leads to the desired result. There is nothing Holy about that, the teaching of Zarathushtra is not about asking for boon and blessing but is all about doing and achieving, about respecting the environment and learning from nature, about respecting the Truth and being Just. The names of the days are a reminder, an organizer of the mass, a mental director, of collectively progressing towards Perfection – Hurvatata.

To think of the names of the day as Holy, to think of them as tradition and to personify them, defeats the original purpose of naming the days, it converts science into superstition. It is even worse when few of the days are made holier than the rest.

If we understand the philosophy and the purpose we will proudly be able to share it with the world and help the world progress in the right direction in their quest towards perfection.





The Mazdayasni Calendar based on the Bundahishn divides the total days in each season into months. Thus, it has 31 days in the first six months because Spring (92.8 days) and Summer (93.6 days) are longer than Autumn (89.9 days) and Winter (88.9 days). The traditional names of the days are limited to 30 and there is no name for the 31st day, but there is “Avardad” to cover the extra day in a leap year. So, Avardad can be used for the 31st day for now, in the hope that the future generations will see the light and agree on a name that suits modern times.

In the Mazdayasni Calendar, the year starts with Ormazd / Hormazd and so does every season. This does not happen with any of the three traditional calendars.

None of the traditional calendars follow the seasons accurately, even the Fasli calendar loses one day every month for the first six months. Thereby it starts summer 3 days early and the festival of Tirgan which was the celebration of the Summer Solstice, the longest day, has lost its ancient link to the first day of the month of Tir and is therefore celebrated 10 days later when the name of the month and the name of the day coincide.

Come Autumn the Fasli calendar is six days earlier than when the season actually starts on the Autumnal Equinox. Again, because the Fasli month starts earlier than the actual season (Fasl), instead of celebrating the Equinox like it is done on Now Rooz, the coinciding of the name Mehr is celebrated as Mehregan.

How can a coinciding of the name be more significant than a phenomenon in nature, is beyond comprehension? If the coinciding of the name of the day and the month are so important then why do we not celebrate Nou Rouz on Farvardin month and Farvardin day instead of on the Vernal Equinox? Or Yalda on Dey month and Dey day instead of the Winter Solstice, the Longest Night. In fact, Now Rooz and Yalda are celebrated correctly because the general Iranian population also celebrates them.

This shows that the generations after the Genocide of the Zarathushtis lost their way. Let us not forget that there were only 7711 Zarathushtis left in Iran when Maneckji Limji Hatari found them and rescued them in 1854. As for the Parses, they were so disoriented by their migration that they celebrate Nov Roj in August.

It is time to unify the calendar see the scientific significance of the festivals and look for the answer in science and nature (Asha), not in superstition. The information in the Bundahishn should not be sacrificed at the altar of a disoriented tradition. The reason and purpose of naming the days should be sought in science and psychology. The Gathas are very clear in advocating the harmonizing of our deeds with nature. The Mazdayasni calendar has been recognized as a perfect calendar from the 2nd millennium BCE. It needs no correction for 110,000 years when 1 day has to be added.



The division of the month and years into weeks is well established in the modern international culture and all activities are closely integrated with them. All three Zarathushti Calendars have borrowed the names of the days of the week from the dominant cultures. In the proposed Mazdayasni Calendar the days of the week are named after the Amesha Spentas and will be a weekly reminder of the Gathic path, in the right order, to Perfection, Immortality, and Spirituality.

Zarathushti culture is a culture that believes in enjoying the life on earth. All the festivals and holidays are for happy occasions and even festivals that have lost their original significance have not been discarded, like the two Arctic Gahanbars. Thus, it would not be out of place to add a few more festivals by celebrating the coinciding of the names of the week with the names of the days. That is when the names of the Amesha Spentas in the week coincide with that of the day. This can happen one or two times a year.  In addition, when the names of the day the week and the month all three coincide a super festivity can be held.

May Wisdom Prevail

  • You must to post comments
Showing 7 results
Your Answer

Please first to submit.

The Congress in Perth has limited time for discussions and debates like in all other previous programmes. One can only discuss so much in the limited time we have available. So we have come up with the idea that we can start discussions on a digital platform from now on until the Congress meets in Perth, June 2018.

This is the first time that digital media is being utilised for the World Zoroastrian Congress in this manner where we are asking anyone who wants to voice their opinions and thoughts about the communities issues. We respect your views and opinions and are sure that you will also do the same for others. Being an educated community we must tolerate and welcome other people's views.

Anyone can put up there ideas and thoughts here as long as the below simple guidelines are followed.

  • No vulgar, sexist or racist remarks against anyone
  • No promotion of any sort including political parties and candidates
  • No remarks that could be deemed derogatory towards other people, cultures or religions etc

There is a panel of moderators worldwide who are the authority to delete any comments or articles that do not meet the guidelines