### Calendar

Perístanom utilizes the ceremonial Gaian calendar, a new calendar for a new age. Please choose a year to view the calendar for that year, as it relates to the Common Era (CE):

The Gaian calendar is a calendrical system inspired by Gaianism and devised by the Order of the Knights of Gaia. It is lunisolar, coordinated with the cycles of both the synodic month and the tropical year. The year 0 EG (Epoch of Gaia, Εποχή της Γαίας) began on 8 January, 1970 CE (Common Era), the date of the calendar’s epoch. The first Earth Day was celebrated that same year, on 14 Yueqiu, 0 EG (21 March, 1970 CE). Any years preceding the year 0 EG are designated with a negative number, such as -1 EG. The meridian that effectively bisects the central caldera (Reusch Crater) of Mount Kilimanjaro, Tanzania, reckoned conventionally as being at 3° 3’ 52” S, 37° 21’ 30” E, is the prime meridian for timekeeping. (That is 37.358333° longitude east of the IERS Reference Meridian.) (Kilimanjaro is the tallest mountain in Africa, the continental birthplace of the human genus.) Gaian Time (Kilimanjaro), then, is precisely 8,966 seconds (or about 2.49 hours) later by the clock than Coordinated Universal Time. The antimeridian, on the opposite side of the Earth from the prime meridian, runs along that which is conventionally 142° 38’ 30” W. (That is 142.641667° longitude west of the IERS Reference Meridian.)

The green, vertical line shown on the above map of the world represents for the Gaian calendar the prime meridian (through Kilimanjaro) and its antimeridian. The red, diagonal line represents for the Gregorian calendar the prime meridian (through Greenwich, England) and its antimeridian.

The Gaian calendar utilizes the nineteen-year Metonic cycle. The year 0 EG ends one particular nineteen-year cycle, and the year 1 EG begins the next. Each year contains twelve (or thirteen) synodic months, those with twenty-nine days generally alternating with those with thirty days. An intercalary month of thirty days is added as a thirteenth month within seven of the nineteen years. This ‘leap month’ occurs as the final month of the second, fifth, seventh, tenth, thirteenth, fifteenth, and eighteenth years of each nineteen-year cycle. An intercalary day is added as a thirtieth day of the twelfth month within four of the nineteen years. This ‘leap day’ occurs as the final day of the third, eighth, twelfth, and seventeenth years of each nineteen-year cycle. Therefore, the basic pattern of days in each month in any given year is: 29, 30, 29, 30, 29, 30, 30, 29, 30, 29, 30, 29/30, (30). Every fifty-seven years (that is, three successive nineteen-year cycles), one day is subtracted from the final month of the most recent year that would otherwise have contained a leap day. (That includes, among others, the year -59 EG, (the year -2 EG), the year 55 EG, the year 112 EG, and the year 169 EG.) Every 855 years (that is, fifteen successive fifty-seven-year cycles), one day is restored to the final month of the most recent year wherein a leap day would otherwise have been removed. (That includes, among others, the year -857 EG, the year -2 EG, the year 853 EG, and the year 1708 EG.) Every 6,840 years (that is, eight successive 855-year cycles), one month of thirty days is subtracted from the most recent year that would otherwise have contained a leap month. (That includes the year -6841 EG, the year -1 EG, and the year 6839 EG.) [We are indebted to David Walker, whose expert recommendations for elegantly coordinating the calendar’s two longest cycles of correction have been adopted, and gratefully appreciated.]

The thirteen months, using names for the Moon from various cultures around the world, are called, in chronological order: ‘Mahina’ (Hawai’ian, 29 days), ‘Tsuku’ (Japanese, 30 days), ‘Yueqiu’ (Mandarin, 29 days), ‘Bulan’ (Indonesian, 30 days), ‘Chandra’ (Sanskrit, 29 days), ‘Qamar’ (Arabic, 30 days), ‘Khonsu’ (Egyptian, 30 days), ‘Inyanga’ (Zulu, 29 days), ‘Gelach’ (Gaelic, 30 days), ‘Tungl’ (Icelandic, 29 days), ‘Quilla’ (Quechua, 30 days), ‘Metztli’ (Nahuatl, 29 or 30 days), and ‘Hanwi’ (Lakota, intercalary, 30 days). Each month contains four lunar weeks of either seven or eight days, corresponding to the quarterly lunar phases. The names of the days of the week, inspired by Proto-Indo-European words, are: ‘Mensós’ [mɛnˈsos 🔊], ‘Taronós’ [tɑrɔˈnos 🔊], ‘Lughous’ [ˈlughɔʊs 🔊], ‘Diwós’ [dɪˈwos 🔊], ‘Ausosés’ [ɑʊsɔˈses 🔊], ‘Satorni’ [sɑˈtornɪ 🔊], and ‘Sawlós’ [sɑwˈlos 🔊]. Between the second and third week of every month, an extra (eighth) day of the week, called ‘Plenós’ [plɛˈnos 🔊], is inserted in observance of the full Moon. At the end of any month containing thirty days, the thirtieth day is called ‘Newos’ [ˈnewɔs 🔊], in observance of the new Moon. This scheme ensures that every month (and roughly every lunar quarter) begins on a Mensós, the first day of the week.