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Your current IP address is 8.222.208.146. </p> <div class="paragraphbreak" style="margin-top:0.5em"></div><div style="font-size: 16px;"> <p>Even while globally blocked, you will <i>usually</i> still be able to edit pages on <a href="https://meta.wikimedia.org/wiki/" class="extiw" title="m:">Meta-Wiki</a>. </p> </div> <div class="paragraphbreak" style="margin-top:0.5em"></div><div style="font-size: 16px;"> <p>If you believe you were blocked by mistake, you can find additional information and instructions in the <a href="https://meta.wikimedia.org/wiki/Special:MyLanguage/No_open_proxies" class="extiw" title="m:Special:MyLanguage/No open proxies">No open proxies</a> global policy. Otherwise, to discuss the block please <a href="https://meta.wikimedia.org/wiki/Steward_requests/Global" class="extiw" title="m:Steward requests/Global">post a request for review on Meta-Wiki</a>. You could also send an email to the <a href="https://meta.wikimedia.org/wiki/Special:MyLanguage/Stewards" class="extiw" title="m:Special:MyLanguage/Stewards">stewards</a> <a href="https://meta.wikimedia.org/wiki/Special:MyLanguage/VRT" class="extiw" title="m:Special:MyLanguage/VRT">VRT</a> queue at <kbd>stewards@wikimedia.org</kbd> including all above details. </p> </div> <p>Other useful links: <a href="https://meta.wikimedia.org/wiki/Global_blocks" class="extiw" title="m:Global blocks">Global blocks</a> · <a href="/wiki/Help:I_have_been_blocked" title="Help:I have been blocked">Help:I have been blocked</a> </p> </div></li></ul><hr /> <div id="viewsourcetext">You can view and copy the source of this page:</div><textarea readonly="" accesskey="," id="wpTextbox1" cols="80" rows="25" style="" class="mw-editfont-monospace" lang="en" dir="ltr" name="wpTextbox1">{{Short description|Calendars used in Iran}} {{For|the official calendar in Iran|Solar Hijri calendar}} {{Use dmy dates|date=September 2022}} {{Today/AD/SH/AH}} The '''Iranian calendar''' or '''Iranian chronology''' ({{langx|fa|گاه‌شماری ایرانی}}, {{lang|fa-Latn|Gâh Ŝomâriye Irâni}}) are a succession of calendars created and used for over two millennia in [[Iran]], also known as Persia. One of the longest chronological records in human history, the Iranian calendar has been modified many times for administrative purposes. The most influential person in laying the frameworks for the calendar and its precision was the 11th century [[Persians|Persian]] [[polymath]], [[Omar Khayyam]]. The modern Iranian calendar is currently the official [[civil calendar]] in Iran. The Iranian [[New Year]] begins at the midnight nearest to the instant of the [[March equinox|northern spring equinox]], as determined by astronomic calculations for the [[meridian (geography)|meridian]] (52.5°E). It is, therefore, an observation-based calendar, unlike the [[Gregorian calendar|Gregorian]], which is rule-based.<ref name="heydari">{{cite web |first=M. |last=Heydari-Malayeri |url=http://aramis.obspm.fr/~heydari/divers/ir-cal-eng.html |title=A concise review of the Iranian calendar|publisher= Paris Observatory |date=2004}}</ref> This equinox occurs on or about 20 March of the Gregorian calendar. The [[time zone]] of Iran is [[Iran Standard Time]], [[UTC+03:30]]. == History == === Ancient calendars === {{See also|Royal stars}} The earliest evidence of Iranian calendrical traditions is from the [[2nd millennium BC|second millennium BC]] and possibly even predates the appearance of the Iranian prophet [[Zoroaster]]. The first fully preserved calendar is that of the [[Achaemenid]]s, a royal dynasty of the 5th century BC who gave rise to Zoroastrianism. Throughout recorded history, [[Persian people|Persians]] have been keen on the idea and importance of having a [[calendar]]. They were among the first cultures to use a [[solar calendar]] and have long favoured a solar over [[lunar calendar|lunar]] and [[lunisolar calendar|lunisolar]] approaches. The sun has always been a religious and divine symbol in [[Iranian culture]] and is the origin of the folklore regarding [[Cyrus the Great]].<ref name=EI-C-i>{{harv|Panaino|1990}}.</ref> ==== Old Persian calendar ==== Old Persian inscriptions and tablets indicate that early Iranians used a [[360-day calendar]] based on the solar observation directly and modified for their beliefs. Days were not named. The months had two or three divisions depending on the phase of the moon. Twelve months of 30 days were named for festivals or activities of the [[pastoral]] year. An [[intercalation (timekeeping)|intercalation]] month was added periodically to keep the calendar synchronized with the seasons.<ref>{{cite journal | journal = Oriental Institute Publications | publisher = University of Chicago Press | volume=92 |first=Richard T. |last=Hallock | title=Persepolis Fortification Tablets |page=3, 75{{ndash}}76 |date=1969}}</ref> The following table lists the Old Persian months, alongside the approximate Gregorian months and approximate Babylonian [[lunar months]].<ref>{{Cite encyclopedia |url=http://www.iranicaonline.org/articles/calendars|title=CALENDARS |encyclopedia=Encyclopaedia Iranica |access-date=2019-05-19}}</ref> {| class="wikitable" |- | style="text-align:center;"| '''Order''' | style="text-align:center;"| '''Approximate corresponding [[Julian calendar|Julian]] months''' | style="text-align:center;"| '''[[Old Persian language|Old Persian]]''' | style="text-align:center;"| '''[[Elamite language|Elamite spelling]]''' | style="text-align:center;"| '''Meaning''' | style="text-align:center;"| '''Approximate corresponding [[Babylonian calendar|Babylonian]] lunar month(s)''' |- | style="text-align:center;"| 1 | style="text-align:center;"| March–April | style="text-align:center;"| Ādukanaiša | style="text-align:center;"| Hadukannaš | style="text-align:center;"| "Sowing (month)" | style="text-align:center;"| [[Nisan|Nīsannu]] |- style="text-align:center;" || 2 || April–May || Θūravāhara || Turmar || "(Month of) strong spring" || Ayyāru |- style="text-align:center;" || 3 || May–June || Θāigraciš || Sākurriziš || "Garlic-collecting (month)" || Sīmannu |- style="text-align:center;" || 4 || June–July || Garmapada || Karmabataš || "Heat-station (month)" || Du'ūzu |- style="text-align:center;" || 5 || July–August || Drnabāji || Turnabaziš || "Harvest (month)" || Ābu |- style="text-align:center;" || 6 || August–September || Kārapaθiya || Karbašiyaš || uncertain || Ulūlū |- | style="text-align:center;"| 7 | style="text-align:center;"| September–October | style="text-align:center;"| Bāgayādiš | style="text-align:center;"| Bakeyatiš | style="text-align:center;"| "(Month of) the worship of [[bhaga|baga]] (god, perhaps [[Mithra]])" | style="text-align:center;"| Tašrītu |- style="text-align:center;" || 8 || October–November || *Vrkazana || Markašanaš || "Wolf killing (month)" || Arahsamna |- style="text-align:center;" || 9 || November–December || Āçiyādiya || Hašiyatiš || "(Month) of the worship of the fire" || Kisilīmu |- style="text-align:center;" || 10 || December–January || Anāmaka || Hanamakaš || "(Month of) the nameless god(?)" || Tebētu |- style="text-align:center;" || 11 || January–February || *Θwayauvā || Samiyamaš || "(Month of) the terrible one" || Šabāţu |- style="text-align:center;" || 12 || February–March || Viyax(a)na || Miyakannaš || "Digging-up (month)" || Addāru |} There were four farming festivals, symmetric about ''maidyoshahem'': {| class="wikitable" style="float:centre" !Festival||Time from previous |- |hamaspathmaidyem||75 days |- |maidyoshahem||105 days |- |ayathrem||105 days |- |maidyarem||75 days |} Two more festivals were later added, creating the six ''gahanbar'': {| class="wikitable" style="float:centre" !Festival||Time from previous |- |hamaspathmaidyem (end of retirement)||75 days |- |maidyozarem (spring)||45 days |- |maidyoshahem (mid-summer)||60 days |- |paitishahem (harvest)||75 days |- |ayathrem (end of the summer)||30 days |- |maidyarem||75 days |} ====Zoroastrian calendar==== {{Main|Zoroastrian calendar}} {{See also|Cappadocian calendar}} The first calendars based on [[Zoroastrian calendar|Zoroastrian]] cosmology appeared in the later Achaemenid period (650 to 330 BC). They evolved over the centuries, but month names changed little until now. The unified [[Achaemenid Empire]] required a distinctive Iranian calendar, and one was devised in [[Egyptian calendar|Egyptian tradition]], with 12 months of 30 days, each dedicated to a [[yazata]] (Eyzad), and four divisions resembling the Semitic week. Four days per month were dedicated to [[Ahura Mazda]] and seven were named after the six [[Amesha Spenta]]s. Thirteen days were named after Fire, Water, Sun, Moon, [[Tishtrya|Tiri]] and Geush Urvan (the soul of all animals), Mithra, [[Sraosha]] (Soroush, yazata of prayer), [[Rashnu]] (the Judge), [[Fravashi]], [[Verethragna|Bahram]] (yazata of victory), Raman (Ramesh meaning peace), and [[Vayu-Vata|Vata]], the divinity of the wind. Three were dedicated to the female divinities, [[Daena]] (yazata of religion and personified conscious), [[Ashi]] (yazata of fortune) and [[Arshtat]] (justice). The remaining four were dedicated to [[Asman]] (lord of sky or Heaven), [[Zam]] (earth), Manthra Spenta (the Bounteous Sacred Word) and Anaghra Raocha (the 'Endless Light' of paradise). The month names and their modern versions are given in the following table. {| class="wikitable" |- | rowspan = "2" | Order | style="text-align:center;"| '''[[Avestan language|Avestan]] name of the Yazata (in the [[genitive case|genitive]])''' | style="text-align:center;"| '''Approximate meaning of the name''' | style="text-align:center;"| '''[[Zoroastrian Middle Persian|Pahlavi Middle Persian]]''' | colspan="3" style="text-align:center;"| '''Modern Iranian Persian''' |- style="text-align:center;" || '''''Romanized''''' || '''''English''''' || '''''Romanized''''' || '''''Native Script''''' || '''''Romanized''''' |- | style="text-align:center;"| 1 | style="text-align:center;"| [[Fravashi|Fravašinąm]] | style="text-align:center;"| (Guardian spirits, souls of the righteous) | style="text-align:center;"| Frawardīn | style="text-align:center;"| {{lang|fa|فروردین}} | style="text-align:center;"| Farvardīn |- | style="text-align:center;"| 2 | style="text-align:center;"| [[Asha Vahishta|Ašahe Vahištahe]] | style="text-align:center;"| "Best Truth" / "Best Righteousness" | style="text-align:center;"| Ardwahišt | style="text-align:center;"| {{lang|fa|اُردیبهشت}} | style="text-align:center;"| Ordībehešt |- | style="text-align:center;"| 3 | style="text-align:center;"| [[Haurvatat|Haurvatātō]] | style="text-align:center;"| "Wholeness" / "Perfection" | style="text-align:center;"| Khordād | style="text-align:center;"| {{lang|fa|خرداد}} | style="text-align:center;"| Khordād |- | style="text-align:center;"| 4 | style="text-align:center;"| [[Tishtrya|Tištryehe]] | style="text-align:center;"| "Sirius" | style="text-align:center;"| Tīr | style="text-align:center;"| {{lang|fa|تیر}} | style="text-align:center;"| Tīr |- | style="text-align:center;"| 5 | style="text-align:center;"| [[Ameretat|Amərətātō]] | style="text-align:center;"| "Immortality" | style="text-align:center;"| Amurdād | style="text-align:center;"| {{lang|fa|اَمرداد}} | style="text-align:center;"| Amordād |- | style="text-align:center;"| 6 | style="text-align:center;"| [[Kshathra Vairya|Xšaθrahe Vairyehe]] | style="text-align:center;"| "Desirable Dominion" | style="text-align:center;"| Shahrewar | style="text-align:center;"| {{lang|fa|شهریور}} | style="text-align:center;"| Shahrīvar |- | style="text-align:center;"| 7 | style="text-align:center;"| [[Mithra|Miθrahe]] | style="text-align:center;"| "Covenant" | style="text-align:center;"| Mihr | style="text-align:center;"| {{lang|fa|مهر}} | style="text-align:center;"| Mehr |- | style="text-align:center;"| 8 | style="text-align:center;"| [[Aban|Apąm]] | style="text-align:center;"| "Waters" | style="text-align:center;"| Ābān | style="text-align:center;"| {{lang|fa|آبان}} | style="text-align:center;"| Ābān |- | style="text-align:center;"| 9 | style="text-align:center;"| [[Atar|Āθrō]] | style="text-align:center;"| "Fire" | style="text-align:center;"| Ādur | style="text-align:center;"| {{lang|fa|آذر}} | style="text-align:center;"| Āzar |- | style="text-align:center;"| 10 | style="text-align:center;"| [[Ahura Mazda|Daθušō]] | style="text-align:center;"| "The Creator" (i.e. Ahura Mazda) | style="text-align:center;"| Day | style="text-align:center;"| {{lang|fa|دی}} | style="text-align:center;"| Dey |- | style="text-align:center;"| 11 | style="text-align:center;"| [[Vohu Manah|Vaŋhə̄uš Manaŋhō]] | style="text-align:center;"| "Good Spirit" | style="text-align:center;"| Wahman | style="text-align:center;"| {{lang|fa|بهمن}} | style="text-align:center;"| Bahman |- | style="text-align:center;"| 12 | style="text-align:center;"| [[Spenta Armaiti|Spəntayā̊ Ārmatōiš]] | style="text-align:center;"| "Holy Devotion" | style="text-align:center;"| Spandarmad | style="text-align:center;"| {{lang|fa|اسفند}} | style="text-align:center;"| Esfand |} The calendar had a significant impact on religious observance. It fixed the pantheon of major divinities, and also ensured that their names were uttered often, since at every Zoroastrian act of worship the yazatas of both day and month were invoked. It also clarified the pattern of festivities; for example, Mitrakanna or [[Mehregan]] was celebrated on Mithra day of Mithra month, and the Tiri festival (Tiragan) was celebrated on Tiri day of the Tiri month. In 538 BC [[Cyrus the Great]] (uncertain if he was a Zoroastrian) conquered Babylon and the Babylonian luni-solar calendar came into use for civil purposes. [[Cambyses II|Cambyses]] conquered Egypt in 525 BC. He was accompanied by [[Darius the Great|Darius]], a Zoroastrian who became ruler of the Persian empire in 517 BC. The Zoroastrians adopted the wandering Egyptian solar calendar of twelve months of thirty days plus five [[Intercalation (timekeeping)#Solar calendars|epagomenal days]]. As their year began in the spring (with the festival of ''norouz'') the ''epagomenai'' were placed just before ''norouz''. In Egypt the star Sirius had significance since every 1460 years (the [[Sothic cycle]]) its [[heliacal rising]] (just before sunrise) marked the Egyptian new year and the inundation of the Nile. In Persia also the star had significance, since its heliacal rising there also coincided with the coming of the rain. The fourth Persian month was ''Tishtrya'' (Sirius, rain star). The vernal equinox at Greenwich fell on the first day of the first month from 487 to 483 BC (inclusive). Adopting S H Taqizadeh's date of 28 March 487 BC for the reform<ref>Taqizadeh S H: ''Old Iranian Calendars'', Royal Asiatic Society (1938).</ref> the calendar for that year is as follows: {|class="wikitable" style="float:centre" |+ * denotes 1 Epagomene !Egyptian month||First day||Persian month||First day |- |4||23 March||1||23*–28 March |- |5||22 April||2||27 April |- |6||22 May||3||27 May |- |7||21 June||4||26 June |- |8||21 July||5||26 July |- |9||20 August||6||25 August |- |10||19 September||7||24 September |- |11||19 October||8||24 October |- |12||18 November||9||23 November |- |1||18*–23 December||10||23 December |- |2||22 January||11||22 January |- |3||21 February||12||21 February |} The fourth month includes 20 July, the date of the heliacal rising of Sirius. In the first year the people carried on using the old calendar, anticipating festival dates by five days. As each day is named after a god, it is important to observe the celebrations on the right day. Thus the ''fravasis'' festival, which in the old calendar was kept between sunset on 30 Spandarmad and sunrise on 1 Frawardin, was now observed throughout the ''epagomenai''. In the second year of the reform, the old 30 Spandarmad was the new 25 Spandarmad, so from then on the festival covered eleven days, up to the new 1 Frawardin. Five days was considered enough for other festivals, however. In all the lands where the Persian calendar was used the ''epagomenai'' were placed at the end of the year. To offset the difference between the agricultural year and the calendar year (the tax-gathering season began after the harvest) the start of the ''araji'' (land-tax) year was delayed by one month every 120 years. A Roman historian, Quintus Curtius Rufus, describing a ceremony in 333 BC, writes: <blockquote>The magi were followed by three hundred and sixty-five young men clad in purple robes, equal in number to the days of a whole year; for the Persians also divided the year into that number of days.<ref>Curtius, iii, 10.</ref></blockquote> After the conquests by [[Alexander III of Macedon|Alexander the Great]] and his death, the Persian territories fell to one of his generals, [[Seleucus I Nicator|Seleucus]] (312 BC), starting the [[Seleucid]] dynasty of Iran. Based on the Greek tradition, Seleucids introduced the practice of dating by era rather than by the reign of individual kings. Their era became known as that of Alexander, or later the [[Seleucid era]]. Since the new rulers were not Zoroastrians, Zoroastrian priests lost their function at the royal courts, and so resented the Seleucids. Although they began dating by eras, they established their own era of Zoroaster. That was the first serious attempt to determine the dates associated with the prophet Zoroaster's life. Priests had no Zoroastrian historical sources, and so turned to Babylonian archives famous in the ancient world. From these they learned that a great event in Persian history took place 228 years before the era of Alexander. In fact, this was the conquest of [[Babylon]] by Cyrus the Great in 539 BC. But the priests misinterpreted this date to be the time the "true faith" was revealed to their prophet, and since [[Avestan]] literature indicates that revelation happened when Zoroaster was 30 years old, 568 BC was taken as his year of birth. The date entered written records as the beginning of the era of Zoroaster, and indeed, the [[Achaemenid Empire|Persian Empire]]. This incorrect date is still mentioned in many current encyclopedias as Zoroaster's birth date. ==== Modifications by Parthians, Ardashir I, Hormizd I, Yazdgerd III ==== The [[Parthia]]ns (Arsacid dynasty) adopted the same calendar system with minor modifications, and dated their era from 248 BC, the date they succeeded the Seleucids. Their names for the months and days are Parthian equivalents of the Avestan ones used previously, differing slightly from the [[Middle Persian]] names used by the [[Sassanians]]. For example, in Achaemenid times the modern Persian month 'Day' was called Dadvah (Creator), in Parthian it was Datush and the Sassanians named it Dadv/Dai (Dadar in Pahlavi). When in April of AD 224 the Parthian dynasty fell and was replaced by the Sasanid, the new king, [[Ardashir I]], abolished the official Babylonian calendar and replaced it with the Zoroastrian. This involved a correction to the places of the ''gahanbar'', which had slipped back in the seasons since they were fixed. These were placed eight months later, as were the ''epagomenai'', the 'Gatha' or 'Gah' days after the ancient Zoroastrian hymns of the same name. Other countries, such as the Armenians and Choresmians, did not accept the change. The new dates were: {|class="wikitable" style="float:centre" !No.||Name||Achaemenid||Choresmian||Sasanian||Time since previous |- |1||maidyozarem||(11-) 15 ii (Ardawahisht)||15 v||(11-) 15 x (Day)||45 days |- |2||maidyoshahem||(11-) 15 iv (Tir)||15 vii||(11-) 15 xii (Spandarmad)||60 days |- |3||paitishahem||(26-) 30 vi (Shahrivar)||30 ix||(26-) 30 ii (Ardawahisht)||75 days |- |4||ayathrem||(26-) 30 vii (Mihr)||30 x||(26-) 30 iii (Khordad)||30 days |- |5||maidyarem||(11-) 15 x (Day)||10 i||(11-) 15 vi (Shahrewar)||75 days |- |6||hamaspathmaidyem||(1-) 5 Epagomene||30 iii||(1-) 5 Epagomene||80 days |} In AD 224 the vernal equinox at Greenwich fell at noon on 21 March, which was 22 Shahrewar. Immediately after the reform 21 March corresponded to 27 Shahrewar. Here is the calendar for AD 225–6: {|class="wikitable" style="float:centre" |+* = 1 Epagomene !Armenian<br /> month||First day||Egyptian<br /> month||First day||Persian<br /> month||First day |- |1||26* September–1 October||4||26 September||1||26 September |- |2||31 October||5||26 October||2||26 October |- |3||30 November||6||25 November||3||25 November |- |4||30 December||7||25 December||4||25 December |- |5||29 January||8||24 January||5||24 January |- |6||28 February||9||23 February||6||23 February |-° |7||30 March||10||25 March||7||25 March |- |8||29 April||11||24 April||8||24 April |- |9||29 May||12||24 May||9||24*–29 May |- |10||28 June||1||23*–28 June||10||28 June |- |11||28 July||2||28 July||11||28 July |- |12||27 August||3||27 August||12||27 August |} The change caused confusion and was immensely unpopular. The new ''epagomenai'' were referred to as "robber days". The people now observed the "Great" ''nowruz'' on 6 Frawardin, which was Zoroaster's birthday and corresponded to 1 Frawardin in the old calendar. The new 1 Frawardin was observed as the "lesser" ''nowruz''. [[Hormizd I]] (AD 272–273) made the intervening days into festivals as well. In AD 273, the vernal equinox at 0° fell at 05:00 UTC on 21 March. [[Yazdegerd I]] reigned from AD 399–420. In AD 400 the equinox fell about 19 March, which was 9 Aban. According to al-Biruni, in that reign there was a double adjustment of the start of the ''araji'' year. The tenth-century astronomer Abu'l-asan Kusyar noted that during the reign of Osrow II (AD 589–628) the sun entered Aries in Adur. This happened throughout his reign. An ''araji'' era was introduced dating from AD 621, and the Yazdegerdi era dates from 16 June AD 632, so the Yazdegerdi era is eleven years behind the ''araji''. ===Muslim conquest=== The Muslim rulers who took over from the middle of the seventh century used the [[Islamic calendar]] for administration, which caused hardship because the year was shorter – i.e. a tax which was formerly collected after the harvest would now have to be paid before the harvest. Traditionally it is said that the [[caliph]] [[Umar|Omar]] reintroduced the Persian calendar for tax collection purposes.{{citation needed|date=April 2017}} In AD 895 there was another double readjustment of the start of the ''araji'' year. It moved from 1 Frawardin (12 April) to 1 Khordad (11 June). By AD 1006 the vernal equinox, 15 March, was again coinciding with ''nowruz'', 1 Frawardin. In that year, therefore, the ''epagomenai'' were delayed four months, moving from the end of Aban to their old position at the end of Spandarmad. This is the calendar for AD 1006/7: {|class="wikitable" style="float:centre" |+ * denotes 1 Epagomene !Armenian<br />month||First day||Old<br />Egyptian<br />month||First day||Persian<br />month||First day |- |1||15*–20 March||4||15 March||1||10*–15 March |- |2||19 April||5||14 April||2||14 April |- |3||19 May||6||14 May||3||14 May |- |4||18 June||7||13 June||4||13 June |- |5||18 July||8||13 July||5||13 July |- |6||17 August||9||12 August||6||12 August |- |7||16 September||10||11 September||7||11 September |- |8||16 October||11||11 October||8||11 October |- |9||15 November||12||10 November||9||10 November |- |10||15 December||1||10*–15 December||10||10 December |- |11||14 January||2||14 January||11||9 January |- |12||13 February||3||13 February||12||8 February |} The ''gahanbar'' did not move quite to their old places, because the fifth moved to 20 Day, which was the old 15 Day, thus increasing the interval between the fourth and fifth to eighty days and reducing the interval between the fifth and sixth to 75 days. The new dates were: {|class="wikitable" style="float:centre" |- !No.||Name||Date||Time since previous |- |1||maidyozarem||(11-) 15 ii (Ardawahisht)||45 days |- |2||maidyoshahem||(11-) 15 iv (Tir)||60 days |- |3||paitishahem||(26-) 30 vi (Shahrivar)||75 days |- |4||ayathrem||(26-) 30 vii (Mihr)||30 days |- |5||maidyarem||(16-) 20 x (Day)||80 days |- |6||hamaspathmaidyem||(1-) 5 Epagomene||75 days |} ===Medieval era: Jalali calendar=== {{Main|Jalali calendar}} In AD 1079, by the order of the Jalal Al-Din Shah [[Seljuq dynasty|Seljuq]]i, the Islamic Calendar (which was and is based on the lunar system) was replaced in Persia by the calendar of [[Omar Khayyam]] and was called the Jalali Calendar. Khayyam and his team had worked 8 years in [[Isfahan]], the capital of Iran during the [[Seljuq dynasty]]. The research and creation of the Khayyam calendar was financially supported by Jalal Al din Shah. Khayyam designed his calendar in which the beginning of the new year, season and month are aligned and he named the first day of the spring and the new year to be Norooz (also spelled [[Nowruz]]). Before Khayyam's calendar, Norooz was not a fixed day and each year could fall in late winter or early spring. From 15 March 1079, when the calendar had slipped a further eighteen days, the ''araji'' calendar was reformed by repeating the first eighteen days of Frawardin. Thus 14 March was 18 Frawardin ''qadimi'' (old) or ''farsi'' (Persian) and 15 March was 1 Frawardin ''jalali'' or ''maleki'' (royal). This new calendar was astronomically calculated, so that it did not have ''epagemonai'' – the months began when the sun entered a new sign of the zodiac. About 120 years after the reform of AD 1006, when the vernal equinox was starting to fall in Ardawahisht, Zoroastrians made it again coincide with ''nowruz'' by adding a second Spandarmad. This ''Shensai'' calendar was a month behind the ''qadimi'' still used in Persia, being used only by the Zoroastrians in India, the Parsees. On 6 June 1745 ([[Old Style and New Style dates|Old Style]]) some [[Parsee]]s re-adopted the ''qadimi'' calendar, and in 1906 some adopted the ''Fasli'' calendar in which 1 Frawardin was equated with 21 March, so that there was a sixth epagomenal day every four years. In 1911 the ''jalali'' calendar became the official national calendar of Persia. Some Zoroastrians in Persia now use the ''Fasli'' calendar, having begun changing to it in 1930. === Modern calendar: Solar Hijri (SH) === {{Main|Solar Hijri calendar}} The present Iranian calendar was legally adopted on 31 March 1925, under the early [[Pahlavi Iran|Pahlavi dynasty]]. The law said that the first day of the year should be the first day of spring in "the true solar year", "as it has been" ever so. It also fixed the number of days in each month, which previously varied by year with the [[Sidereal and tropical astrology|sidereal zodiac]]. It revived the ancient Persian names, which are still used. 1 Farvardin is the day whose midnight start is nearest to the instant of vernal equinox. The first six months have 31 days, the next five thirty, and the twelfth has 29 days and 30 in leap years. It specified [[Epoch (reference date)|the origin of the calendar]] to be the [[Hijrah]] of Muhammad from Mecca to Medina in AD 622.<ref>Fazlur Rehman Shaikh, ''Chronology of Prophetic Events'' (London: Ta-Ha Publishers Ltd., 2001), p. 157.</ref> It also deprecated the 12-year cycles of the Chinese-Uighur calendar which were not officially sanctioned but were commonly used. In 1976, Shah [[Mohammad Reza Pahlavi]] changed the origin of the calendar to the beginning of [[Cyrus the Great]]'s reign as its first year, rather than the [[Hegira|Hijra]] of [[Muhammad]]. Overnight, the year changed from 1355 to 2535. This change only lasted until the [[Iranian revolution]] in 1979, at which time the calendar reverted to Solar Hijri.<ref>{{cite book|url=https://books.google.com/books?id=Yxd3E-_AqSEC&pg=PA13 |title=Persian Pilgrimages by Afshin Molavi |isbn=9780393051193 |last1=Molavi |first1=Afshin |last2=Mawlawī |first2=Afšīn |year=2002 }}</ref> Correspondence of Solar Hijri and Gregorian calendars (Solar Hijri leap years are marked *):<ref>{{cite web|first=Holger |last=Oertel |url=http://www.ortelius.de/kalender/pers_en.php |title=Persian calendar by Holger Oertel |publisher=Ortelius.de |date=30 May 2009 |access-date=2012-08-11 |url-status=dead |archive-url=https://web.archive.org/web/20120716225712/http://www.ortelius.de/kalender/pers_en.php |archive-date=16 July 2012 }}</ref> {| class="wikitable" |- ! 33-year <br/> cycle<ref>[http://www.astro.uni.torun.pl/~kb/Papers/EMP/PersianC-EMP.htm ''The Persian calendar for 3000 years''], (Kazimierz M Borkowski), ''Earth, Moon, and Planetsss'', '''74''' (1996), No. 3, pp 223–230.</ref> || Solar Hijri year || Gregorian year || Solar Hijri year || Gregorian year |- style="text-align:center; background:#ccc;" | 1 || 1354*|| 21 March 1975 – 20 March 1976 || 1387*|| 20 March 2008 – 20 March 2009 |- style="text-align:center;" | 2 || 1355 || 21 March 1976 – 20 March 1977 || 1388 || 21 March 2009 – 20 March 2010 |- style="text-align:center;" | 3 || 1356 || 21 March 1977 – 20 March 1978 || 1389 || 21 March 2010 – 20 March 2011 |- style="text-align:center;" | 4 || 1357 || 21 March 1978 – 20 March 1979 || 1390 || 21 March 2011 – 19 March 2012 |- style="text-align:center; background:#ccc;" | 5 || 1358*|| 21 March 1979 – 20 March 1980 || 1391*|| 20 March 2012 – 20 March 2013 |- style="text-align:center;" | 6 || 1359 || 21 March 1980 – 20 March 1981 || 1392 || 21 March 2013 – 20 March 2014 |- style="text-align:center;" | 7 || 1360 || 21 March 1981 – 20 March 1982 || 1393 || 21 March 2014 – 20 March 2015 |- style="text-align:center;" | 8 || 1361 || 21 March 1982 – 20 March 1983 || 1394 || 21 March 2015 – 19 March 2016 |- style="text-align:center; background:#ccc;" | 9 || 1362*|| 21 March 1983 – 20 March 1984 || 1395*|| 20 March 2016 – 20 March 2017 |- style="text-align:center;" | 10 || 1363 || 21 March 1984 – 20 March 1985 || 1396 || 21 March 2017 – 20 March 2018 |- style="text-align:center;" | 11 || 1364 || 21 March 1985 – 20 March 1986 || 1397 || 21 March 2018 – 20 March 2019 |- style="text-align:center;" | 12 || 1365 || 21 March 1986 – 20 March 1987 || 1398 || 21 March 2019 – 19 March 2020 |- style="text-align:center; background:#ccc;" | 13 || 1366*|| 21 March 1987 – 20 March 1988 || 1399* || 20 March 2020 – 20 March 2021 |- style="text-align:center;" | 14 || 1367 || 21 March 1988 – 20 March 1989 || 1400 || 21 March 2021 – 20 March 2022 |- style="text-align:center;" | 15 || 1368 || 21 March 1989 – 20 March 1990 || 1401 || 21 March 2022 – 20 March 2023 |- style="text-align:center;" | 16 || 1369 || 21 March 1990 – 20 March 1991 || 1402 || 21 March 2023 – 19 March 2024 |- style="text-align:center; background:#ccc;" | 17 || 1370*|| 21 March 1991 – 20 March 1992 || '''1403'''*|| '''20 March 2024 – 20 March 2025''' |- style="text-align:center;" | 18 || 1371 || 21 March 1992 – 20 March 1993 || 1404 || 21 March 2025 – 20 March 2026 |- style="text-align:center;" | 19 || 1372 || 21 March 1993 – 20 March 1994 || 1405 || 21 March 2026 – 20 March 2027 |- style="text-align:center;" | 20 || 1373 || 21 March 1994 – 20 March 1995 || 1406 || 21 March 2027 – 19 March 2028 |- style="text-align:center;" | 21 || 1374 || 21 March 1995 – 19 March 1996 || 1407 || 20 March 2028 – 19 March 2029 |- style="text-align:center; background:#ccc;" | 22 || 1375*||20 March 1996 – 20 March 1997 || 1408*||20 March 2029 – 20 March 2030 |- style="text-align:center;" | 23 || 1376 || 21 March 1997 – 20 March 1998 || 1409 || 21 March 2030 – 20 March 2031 |- style="text-align:center;" | 24 || 1377 || 21 March 1998 – 20 March 1999 || 1410 || 21 March 2031 – 19 March 2032 |- style="text-align:center;" | 25 || 1378 || 21 March 1999 – 19 March 2000 || 1411 || 20 March 2032 – 19 March 2033 |- style="text-align:center; background:#ccc;" | 26 || 1379*|| 20 March 2000 – 20 March 2001 || 1412*|| 20 March 2033 – 20 March 2034 |- style="text-align:center;" | 27 || 1380 || 21 March 2001 – 20 March 2002 || 1413 || 21 March 2034 – 20 March 2035 |- style="text-align:center;" | 28 || 1381 || 21 March 2002 – 20 March 2003 || 1414 || 21 March 2035 – 19 March 2036 |- style="text-align:center;" | 29 || 1382 || 21 March 2003 – 19 March 2004 || 1415 || 20 March 2036 – 19 March 2037 |- style="text-align:center; background:#ccc;" | 30 || 1383*|| 20 March 2004 – 20 March 2005 || 1416*|| 20 March 2037 – 20 March 2038 |- style="text-align:center;" | 31 || 1384 || 21 March 2005 – 20 March 2006 || 1417 || 21 March 2038 – 20 March 2039 |- style="text-align:center;" | 32 || 1385 || 21 March 2006 – 20 March 2007 || 1418 || 21 March 2039 – 19 March 2040 |- style="text-align:center;" | 33 || 1386 || 21 March 2007 – 19 March 2008 || 1419 || 20 March 2040 – 19 March 2041 |} == See also == {{Portal|Iran}} * [[Solar Hijri calendar]] * [[Tabarian calendar]] * [[Armenian calendar]] * [[Islamic calendar|Lunar Hijri calendar]] * [[Pre-Islamic Arabian calendar]] * [[Assyrian calendar]] * [[Mandaean calendar]] * [[Hebrew calendar]] * [[Babylonian calendar]] * {{Annotated link|Seleucid era|''Anno Graecorum''}} * {{Annotated link|Rumi calendar|''Rumi'' calendar}} * {{Annotated link|Royal stars|Royal stars}} * {{Annotated link|Shanbeh|Shanbeh}} == References == ===Citations=== {{Reflist|30em}} === Bibliography === * {{cite encyclopedia |first=Antonio |last=Panaino |title=CALENDARS, i. Pre-Islamic calendars |url=https://www.iranicaonline.org/articles/calendars#pt1 |encyclopedia=Encyclopaedia Iranica |year=1990 |volume=4 |isbn=0-7100-9132-X}} * Taqîzâda, Sayyid Ḥasan, Gâhshumârî dar Îrân-i qadîm, Tehran (Čapkhâna-yi Majlis) 1316/1937-1938, (reprinted with the author's notes appointed to the first edition in the 10th vol. of the Opera omnia, ed.by Î. Afshâr, Tehran, 1357/1978-79). Complete Italian ed.: H. Taqizadeh, Il computo del tempo nell'Iran antico, ed. and transl. by S. Cristoforetti, Roma (ISIAO), 2010. {{ISBN|978-88-6323-290-5}} == External links == * [http://www.tondering.dk/claus/cal/persian.php#leap How the leap years are calculated] * [http://www.iranian.com/History/April99/Months/index.html Meaning of the names of the months in the Persian Calendar] * [https://web.archive.org/web/20180418111538/http://www.gita.ir/products/calendar/gadget.aspx Persian(shamsi)/Gregorian/Islamic(hijri) Windows Gadget – with persian occasions] ; Online calendars and converters * [http://www.PersDay.com/ PersDay.com: Online Persian Calendar and Memo Book Web Application specially designed for Iranians, shows Persian(Hijri-Shamsi), Gregorian, and Hijri-Ghamari calendars for each day; Users can write different types of notes for each day, week, month, season, or year.] {{Webarchive|url=https://web.archive.org/web/20150526130410/http://www.persday.com/ |date=26 May 2015 }} * [http://www.iranchamber.com/calendar/converter/iranian_calendar_converter.php An online Persian (shamsi)/Gregorian/Islamic(hijri) date converter on http://www.iranchamber.com] * [http://www.aaahoo.com/main/dispCalendar.asp?ULanID=E&PR=y Online Persian Calendar from aaahoo portal] * [https://www.parstimes.com/persian/calendar/ Online Persian Calendar from parstimes.com portal] * [http://date.samic.org An online simple Shamsi/Gregorian date converter] ; Programming * [http://farhadi.ir/works/jalalijscalendar GPL Iranian Calendar in JavaScript] {{ndash}} [https://web.archive.org/web/20120213155828/http://farhadi.ir/works/jalalijscalendar Archive] at the [[Wayback Machine]] (archived {{date|2012-02-13|DMY}}) * [http://msdn2.microsoft.com/en-us/library/system.globalization.persiancalendar.aspx System.Globalization.PersianCalendar class documentation in MSDN Library] (The implementation of the Persian Calendar in Microsoft .NET Framework 2.0) * [http://www.mshams.ir/programs/persianzodiac Persian Zodiac a free, open source AIR application.] {{ndash}} 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