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The Mandaean calendar is a 365-day solar calendar used by the Mandaean people. It consists of twelve 30-day months, with five extra days at the end of Šumbulta (the 8th month). The Parwanaya (or Panja) festival takes place during those five days. There is no leap year therefore every four years all Mandaean dates (like beginnings of the months or festivals) move one day back with respect to the Gregorian calendar.
Each month is named after a constellation (manzalta). The Mandaic names of the 12 constellations of the Zodiac are derived from Aramaic common roots. As with the seven planets, overall the 12 constellations, frequently known as the trisar (Classical Mandaic: ࡕࡓࡉࡎࡀࡓ, "The Twelve") or trisar malwašia ("Twelve Constellations") in Mandaean scriptures, are generally not viewed favorably in Mandaeism, since they constitute part of the entourage of Ruha, the Queen of the World of Darkness who is also their mother.
|Order of month||Constellation||Mandaic name||Mandaic script|
Each month consists of exactly 30 days. The Parwanaya festival comes between the 8th month (Šumbulta) and 9th month (Qaina) to make up for 5 extra days in the solar calendar.
Due to a lack of a leap year included in the Mandaean calendar, dates change by one day every four years with respect to the Gregorian calendar. Currently, for example in 2022 CE, Sartana meaning Cancer corresponds to December / January in the Gregorian calendar instead of June / July.
The hours of the day are counted starting at dawn (ṣipra),: 75 although Mandaeans formerly counted the hours of the day starting at sunset or evening (paina). In Mandaic, a 24-hour day is known as a yuma, daytime as ʿumama, and nighttime as lilia.
Some days are considered to be auspicious, while others are ominous (mbaṭṭal).
The days of the week are as follows. Habšaba (Sunday) is considered to be the first day of the week.
|Day of the week||English||Mandaic||Hebrew|
|1||Sunday||Habšaba (ࡄࡀࡁࡔࡀࡁࡀ)||Yom Rishon|
|2||Monday||Trin Habšaba||Yom Sheni|
|3||Tuesday||Tlata Habšaba||Yom Shlishi|
|4||Wednesday||Arba Habšaba||Yom Revii|
|5||Thursday||Hamša Habšaba||Yom Hamishi|
|6||Friday||Yuma d-Rahatia||Yom Shishi|
|7||Saturday||Yuma d-Šafta (Shabta)||Yom Shabbat|
The four seasons are as follows, with the year starting with winter:
The Mandaean calendar is calculated from the year that Adam was born, or approximately 443,370 BCE. Charles G. Häberl calculates the date 18 July 2019 CE corresponds to 1 Dowla 481,343 AA (AA = after the creation of Adam).
All Mandaean years consist of exactly 365 days (12 regular months of 30 days each, plus the 5 intercalary days of the Parwanaya). Since Mandaean months do not have leap years accounted for every four years, seasons "slip back" and will not correspond to the same Gregorian months over time.
According to Book 18 of the Right Ginza, there are four epochs (or eras) of the world, which is given a duration of 480,000 years.
Mandaean festivals are:
Below is an example of a calendar year for the Mandaean year 445375, which corresponds to the Gregorian calendar years 2005–2006 or Jewish calendar year 5766 (Gelbert 2005: 274). Fasting (Classical Mandaic: ࡑࡀࡅࡌࡀ, romanized: ṣauma) is practiced on some days.
|No.||Mandaean month||Gregorian month||Festival(s)|
|1||Dowla||July / August||1st and 2nd day of Dowla: the New Year – Dehwa Rabba|
6th and 7th day of Dowla: festival of Šišlam Rabba (festival of trees). Eating meat, fish and eggs is not permitted.
|2||Nuna||August / September||25th of Nuna: light fasting|
|3||Ambero||September / October|
|4||Towra||October / November||1st of Toura: Memorial Day (Ead Fel)|
2nd, 3rd, and 4th of Toura: light fasting
18th of Towra: Dehwa Hanina (celebration of the completed creation)
|5||Selmi||November / December|
|6||Saratana||December / January||1st of Saratana: Noah returned to dry land (Ashoriya)|
9th of Saratana: light fasting
15th of Saratana: light fasting
23rd of Saratana: light fasting
|7||Aria||January / February|
|8||Shumbolta||February / March||From 26th to 30th of Shumbolta: full fasting|
|(Panja)||(Panja)||Panja or Parwanaya – 5 intercalary days: days of remembrance (or "days without night"). Single and group baptizing (masbuta) is permitted. Eating bread with yeast is not allowed.|
|9||Qina||March / April||1st of Qina: light fasting|
|10||Arqwa||April / May|
|11||Heṭia||May / June||1st of Heṭia: Dehwa Daimana (birthday of Yehya Yehanna).|
|12||Gadia||June / July||28th and 29th of Gadia: light fasting|
30th of Gadia (New Year's Eve): Kanshiy u-Zahly (cleaning and washing the whole household, baptism and buying new clothes). At sunset, Mandaeans will close their doors and stay inside for 36 hours to commemorate the assembly of the angels in heaven.