Have you ever considered the effects of the current 12-month calendar on our beliefs, customs, choices, behaviors, and actual relationship with time? Could humanity benefit by simply attuning to the natural standard of 13 Months/Moons of 28 days each?
We invite you to explore 7 KEY FACTS to understand the importance of Calendar Reform NOW…

A calendar is an artificial construct whose fundamental purpose is to be the synchronizing and coordinating operating system for human society by keeping accurate track of natural cycles in time, most commonly to keep track of the passing of days and years.

If the calendar does not increase synchronization within its society, it is not performing its highest functions: to harmonize the mind with nature, and to measure or replicate natural cycles in time, in order to place its society in a state of harmony and synchronization with the biosphere, and with itself. The 13-month, 28-day alternative has been in use on this planet for more than 6000 years.

In prehistoric India and China, and throughout South America it was the standard time-keeping system. The Essenes, Egyptians, Polynesians, Maya, Inca, Lakota, and Cherokee used a 13-month, 28-day calendar. The Celtic knowledge of the Druids is based on the Tree Calendar, also a 13-month, 28-day calendar. Today many cultures are still using their traditional 13-month calendar system.




“A calendar, any calendar, is commonly understood as a system for dividing time over extended periods. A day is the base unit of a calendar, and the solar year is the base extended period.” The length of the solar year is currently reckoned at 365.242199 days. The Gregorian calendar divides this duration into twelve uneven months – four months of 30 days, seven of 31 days, and one of 28 days. On the Gregorian calendar the accrued quarter day is handled by inserting February 29th every four years. This is not necessarily the most logical, nor only way of handling the accrued quarter day. The point is this: There is no logical or scientific relation between the exact length of the year and the use of the Gregorian calendar to measure and divide that length. Nonetheless, the Gregorian calendar is held up as the most perfect instrument for dividing time, and is in use worldwide as the official standard. This is the only standard of measure used today that has unequal units! As an arbitrary division of the solar year, this calendar although illogical, unscientific and artificial, remains the central unquestioned institution of our modern society.





There is just ONE way to have a lunar~solar calendar. The Moon revolves around Earth 13 times during the time Earth revolves around the Sun once. Therefore, to have a lunar solar calendar, we need 13 months per year, not 12. There is just ONE way to establish a lunar~solar society and coordinate its activities according to the natural timing of the Moon and the Sun, both at once: 13 equal months of 4 weeks is exactly the same as 52 equal weeks of 7 days. And this is is exactly the same as 13 equal months of 28 days.

This 13 x 28-day matrix can also be divided into equal parts as 4 quarter-years of 91 days each. 91 days is 13 weeks of 7 days. 52 = 13 x 4 is the key We have the opportunity to collectively use this simple truth and establish a new lunar solar society, directly leading to the minds and actions of our people being harmonized on a 28-day biological standard in tune with the reality of our natural surroundings.

No matter what the establishment of a lunar solar society may mean to humanity and the biosphere, it is clear that there is one way to coordinate and regulate society according to the natural timing of the Moon and the Sun, both at once: 13 equal months of 4 weeks each.



Any standard of measure which is crooked and irregular is inherently problematic. If such a standard of measure is used to measure time, it is inherently a major problem for human consciousness. It is a really bad habit that could cost our life and the life of other species on Earth. Since the Gregorian calendar lacks of a standard unit of measure, it lacks logic and reason. It numbs and befuddles the mind when trying to make calculations by it. It is shrouded in an arcane and medieval obscuritanism. The net effect of the use of this calendar is to perpetuate a fundamental level of mental confusion and ignorance concerning the actual nature of time itself – an ignorance that is hardened into dogma by the unwillingness of habit to consider any other possibility, and to even accept the entire system as second nature. Within our natural relationship with the moon and the sun, time is most easily and logically measured by 13 sets of 28 days each. This is because 28 days is: + The biological or menstrual/life cycle + The cycle of the moon’s revolution  around the Earth + Exactly 4 weeks, and when repeated 13 times it is 52 weeks, one day short of a 365-day year.




There is an increasing atmosphere of war and conflict on Earth. Everyone who loves peace wants to do something. And we need to do something new. Something that will stop the violence and the injustice. Something that will stop the war. Something radically simple. How about stopping time and changing the calendar? Yes. If we can stop the time, we can end the time of war. And then we can enter a new time of peace. The choice is actually ours. It’s not as impossible as it sounds. Stopping time could be the greatest collective self-empowerment the human race has ever experienced. And this exercise in self-empowerment is just waiting for you to join in. But don’t hesitate. As the saying has it, time is of the essence. To change the calendar now is to change the course of history and to revolutionize altogether the future of civilization on Earth. We must understand that the artificial operating system we have lived under for more than four centuries has contributed, more than anything, to the enduring and increasing chaos perpetuated throughout the planet, affecting Mother Earth (the Biosphere), in ways we have been conditioned to simply ignore. No longer can we afford to remain ignorant. And, we do have a choice!




It is important for us to remember that during the first half of the 20th century, a vigorous and well organized calendar reform movement flourished. George Eastman of Eastman Kodak organized a great campaign on behalf of a particular 13-month, 28-day calendar, known as The International Fixed Calendar, a perpetual calendar (same every year) with 13 equal months of exactly 4 weeks (28 days) each, comprising 364 days, and with the final 365th day held not in any week or month, often known as a “Null Day” or “Zero Day,” so that the first day of the year is always the first day of the week, a Sunday. In the United States alone, over one hundred industries adopted a 13-month, 28-day perpetual calendar.It was announced that on January 1, 1933, we would return to 13 months of 28 days each. But the Vatican resisted to it by focusing on a campaign against the “Null Day.”

The World Thirteen Moon Calendar Change Peace Plan was first proposed to the United Nations for its 50th Anniversary in 1995. Later, during the year 2000, the World Thirteen Moon Calendar Change Peace Movement, leaded by Jose Arguelles and Lloydine Burris, started a 4-Year Campaign for the New Time. This effort was undertaken to reach a critical mass of human beings that would adopt and support the GreatCalendar Change Initiative of 2004.



Thirteen years have elapsed since the last attempt to change the calendar, and NOW is the time to re-introduce this idea to the world. The 13-Month, 28-Day Calendar Awareness Campaign is a people’s movement, synchronized with Nature’s movement, to restore harmony and peace on Earth. This movement is destined to usher a Calendar Referendum for the year 2020, when a new collective choice point can be reached to implement a new timing system based on the accurate measure of the actual harmonic principles governing the astronomical cycles of the Earth.
The 13-Moon Calendar belongs to no religion, is purely non- sectarian, democratically embracing all beliefs and holds a peaceful balance between the various solar and lunar calendars used around the world, synchronizing all other calendars. It is deeply inspired by the values promoted by the Banner of Peace and is currently used in over 80 countries on Earth. The Banner of Peace is a powerful universal symbol which was adapted by the visionary artist Nicholas Roerich to serve as an emblem for the desire of human culture to rise above war. This flag has been flown globally, as a sign of peace and culture, since the 1930’s.This is why the 13-Moon Calendar Change Peace Movement adopted this symbol as representative of its purpose and mission.