Dating systems

This is a list of calendars, dating systems, chronologies, etc. used in Magic: The Gathering. The infinite planes of the multiverse do not necessarily carry the same lengths of day, month, or year. However, years seem to pass between planes concurrently in-storyline, so a Ravnican year can be presumed to be the same length as a Dominarian year. Below is a conversion table of the known dates of some of the planes:
Plane 	Year length	Most recent date
China 	 	280 AD at the end of Portal Three Kingdoms
Dominaria	420 days 	4562 AR as of Dominaria United
Innistrad	355+ days 	120th of Hunter's Moon, Ava. 719 during Innistrad
Kamigawa 	 	1004.1053 during the Era of EnlightenmentMiyuki Jane Pinckard (2022). Selected Field Reports on Kami. Beadle & Grimm's Platinum Edition Set.
Ixalan 	 	5 Dawn Era as of The Lost Caverns of Ixalan
Mirrodin
New Phyrexia	 	100-23-229723.3 during late Scars of Mirrodin block
Ravnica 	365 days 	10,076 ZC as of D&D Guildmasters' Guide to Ravnica
Theros 	~364 days 	
==Cridhe==
In Cridhe the years are given as they relate to the Parting. The only other known date is that of the Mending of the Clan Tree, in 520.Teri McLaren (1996). The Cursed Land. Harper Prism
==Dominaria==
Dominarian years are 420 days long and are organized by most developed cultures into twelve months, each of 35-days.Pete Venters, Kij Johnson, and Scott Hungerford (April 1997). "Dominian Chronicles". The Duelist #16, p.63-65
===Argivian Reckoning===
Argivian Reckoning (AR) is the primary calendar used on Dominaria (notably excepting the continent of Corondor). It sets year 0 as the year in which both Urza and Mishra were born. It only came into use many years after the time of the Brothers and was used informally for several thousand years before an attempt was made to clarify historical facts. It is named after New Argive, a country famed for its scholars. The last time the date was explicitly mentioned, it was 4562 AR.
===Common Era===
Common Era (CE) is a dating system established by New Sumifans in Almaaz. It starts around 3035 AR. Conversely, the use of BCE ("Before Common Era") refers to the amount of years before the start of CE dating, so 3000 BCE correponds to 35 AR, which was soon after Almaaz joined Mishra's forces.Song of Time
===Penregon Founding===
Penregon Founding, or PF for short, is the only calendar system known to be in use at the time of The Brothers' War. It sets Year 0 as the year Penregon, the capital of Argive, was founded. When Urza and Mishra were born (0 AR), the year was 912 PF.
===Reckoning of the Sages of Minorad===
The Reckoning of the Sages of Minorad is a calendar primarily used in Corondor. Year 1 in this reckoning begins on the anniversary of the gathering of the Sages of Minorad. It corresponds with the year 3000 of the Argivian Reckoning.
===Others===
The various empires of Sarpadia had their own systems of dating.(Fall 1994) Fallen Empires. The Duelist, 8-11 During the four months over which Fallen Empires took place, these included:
*Dwarves of the Crimson Peaks: Second Day of the Moon of Snow's End
*Elves of Havenwood: Flowerfeast Eve
*Vodalian merfolk: Twelfth Tide of the Fifth Moon
*Icatia: Fifth Day of Gothwinstide
*Icatia: Seventh Day of Gothwinstide
*Order of the Ebon Hand: Time of the Seventh Sacrifice
*Icatia: Two days past Allfest
*Crimson Peaks: Fourteenth Day of the Moon of Cloudless Skies
==Innistrad==
Dates on Innistrad are measured using the stages of the moon and the years since Avacyn's creation, commonly shortened to "Ava." There are three seasons on Innistrad: Harvest Moon (autumn), Hunter's Moon (winter), and New Moon (spring). It is unclear how long a season or a year on Innistrad lasts, although Hunter's Moon is said to be the longest and New Moon the shortest. The latest dates known for each season in-lore are the 118th of Harvest Moon in the years of Avacyn 699 and 711, the 121st of Hunter's Moon, Ava. 718, and the 116th of New Moon, Ava. 714. If the seasons are consistent each year, this would make an Innistrad year roughly as long as an Earth year.
==Ixalan==
Years in the Legion of Dusk are marked by their distance from the Legion's arrival on the continent of Ixalan in 4558 AR, with years beforehand labeled "Before Dawn" (BD) and years after labeled "Dawn Era."
Years in Ixalan's Core are known as "turnings." A "full count" is twenty, making it equivalent to a k'atun in the Mesoamerican Long Count calendar, which the Oltec's resembles.
The Sun Empire records three seasons on the continent of Ixalan: rainy season, cool season, and hot season.
==Kamigawa==
Kamigawa uses numbered years, although they are not given a name and their start is unknown. As the year 1053 occurred during the Age of Enlightenment, it is possible years are marked following the Kami War. Kamigawan months are numbered, and there are at least ten of them. The eighth and ninth months have at least 29 days. Dates are recorded as a string with the two-digit month followed by a two-digit day, a period, and the year (e.g. the first day of the eighth month of 1053 was 0801.1053). Time is recorded in 24-hour notation.
==Kephalai==
The months of Kephalai are numbered, up to at least Eighthmonth.
==Mirrodin-New Phyrexia==
===Mirrodin===
On Mirrodin, time is recorded by the cycles of the five suns, although it is not clear how much time passes within each cycle. In the novel The Moons of Mirrodin, it is stated that the levelers attack every 100 cycles, while states that this event occurs every century, possibly demonstrating that a cycle is simply another term for a year. Every 100 cycles, at a time called "the convergence," the four suns either aligned above their landsWill McDermott. (2003.) The Moons of Mirrodin, Wizards of the Coast. ISBN-13 0-7869-2995-2. or came into alignment with each other.Jess Lebow. (2004.) The Darksteel Eye, Wizards of the Coast. ISBN-13 0-7869-3140-X.
Kiryk's field reports just before his capture and compleation range from 3rd cycle of the Blue sun, 10th periodic, 5th locus to 6th cycle, 5th periodic, 15th locus. There are at least 16 periodics and 15 loci in a cycle.
===New Phyrexia===
After the plane's Phyrexianization, Jin-Gitaxias's Progress Engine recorded dates in numeric sequences, although it is unclear what they denote. Unctus's field reports from after his compleation range from 100-23-200239.6 to 100-23-229723.3.
==Phyrexia==
In Planeswalker, Xantcha states that Phyrexians use days, seasons, and years, but she does not understand "months." Overall, she states that Phyrexia was a place where time "went unmeasured."Lynn Abbey. (1998.) Planeswalker, Wizards of the Coast. ISBN-13 0-7869-1182-4.
==Ravnica==
Ravnica uses the measure of Al Concordant and Zal Concordant. Al Concordant is used to measure the time before the signing of the Guildpact, while Zal Concordant is used afterward. The events of Return to Ravnica block take place in 10,075 ZC, and the Guildmaster's Guide to Ravnica depicts Ravnica before Guilds of Ravnica block in the year 10,076 ZC, commonly referred to as ’76.
Ravnica’s calendar contains 365 24-hour days divided into twelve months, with the same number of days as the Gregorian calendar.James Wyatt and Jeremy Crawford (November 2018). "D&D Guildmasters' Guide to Ravnica", Wizards of the Coast. The year begins with 1 Seleszeni (March 1). The annual celebration of the Guildpact begins on 28 Zuun and extends into 1 Seleszeni.
# Seleszeni or OrzabinRei Nakazawa (2006), "Life is Beautiful", Wizards of the Coast (March)
# Dhazo (April)
# Prahz or Prazh (May)
# Mokosh (June)
# Paujal (July)
# Cizarm (August)
# Tevnember (September)
# Golgar (October)
# Quaegar (November)
# Xivaskir (December)
# Griev (January)
# Zuun (February)
==Theros==
===Meletian Calendar===
Although the method of marking years on Theros is unknown, Meletis has developed a calendar that has been at least partially adopted in the poleis of Akros and Setessa. The calendar is composed of 12 months, each beginning with the new moon, alternating between 30 and 29 days, and named after a festival celebrated during that month. Roughly every three years, an extra 30-day month is added to the end of the year, giving Theros a 364-day year, meaning its years are likely the same length as on Earth.Wizards RPG Team (2020), D&D Mythic Odysseys of Theros, Wizards of the Coast
# Lyokymion
# Protokynion
# Astrapion
# Polidrysion
# Thriambion (Meletis) and Iroagonion (Akros)
# Megasphagion
# Chalcanapsion
# Necrologion
# Therimakarion
# Katabasion
# Cheimazion
# Agrypnion
# Anagrypnion (occurs every three years)
==References==
Category:Storylines