InfopediaPk - All Facts in One Site!
  • Home
  • Islamic
    • Islamic Articles >
      • Holy Quran
      • Tafhim-ul-Quran >
        • About Tafhim-ul-Quran
        • Sura No 01 to 15 >
          • 01;Sura Al-Fatiha
          • 02;Sura Al-Baqarah
          • 03;Sura Al-i-Imran
          • 04;Sura An-Nisa
          • 05;Sura Al-Maida
          • 06;Sura Al-An'am
          • 07;Sura Al-A'raf
          • 08;Sura Al-Anfal
          • 09;Sura At-Tawbah "Or" Sura Al-Baraat
          • 10;Sura Yunus
          • 11;Sura Hud
          • 12;Sura Yusuf
          • 13;Sura Ar-Ra'd
          • 14;Sura Ibrahim
          • 15;Sura Al-Hijr
        • Sura No 16 to 30 >
          • 16;Sura An-Nahl
          • 17;Sura Al-Isra "Or" Sura Bani Israil
          • 18;Sura Al-Kahf
          • 19;Sura Maryam
          • 20;Sura Ta Ha
          • 21;Sura Al-Anbiya
          • 22;Sura Al-Hajj
          • 23;Sura Al-Mu’minoon
          • 24;Sura An-Nur
          • 25;Sura Al-Furqan
          • 26;Sura Ash-Shuara
          • 27;Sura Al-Naml
          • 28;Sura Al-Qasas
          • 29;Sura Al-Ankabut
          • 30;Sura Ar-Rum
        • Sura No 31 to 45 >
          • 31;Sura Luqman
          • 32;Sura As-Sajda
          • 33;Sura Al-Ahzab
          • 34;Sura Saba
          • 35;Sura Al-Malaika "Or" Sura Fatir
          • 36;Sura Ya Sin
          • 37;Sura As-Saaffat
          • 38;Sura Sad
          • 39;Sura Az-Zumar
          • 40;Sura Al-Mu'min "Or" Sura Al-Ghafir
          • 41;Sura Ha Mim As Sajdah "Or" Surah Fussilat
          • 42;Sura Ash-Shura
          • 43;Sura Az-Zukhruf
          • 44;Sura Ad-Dukhan
          • 45;Sura Al-Jathiya
        • Sura No 46 to 60 >
          • 46;Sura Al-Ahqaf
          • 47;Sura Mohammad
          • 48;Sura Al-Fath
          • 49;Sura Al-Hujurat
          • 50;Sura Qaf
          • 51;Sura Adh-Dhariyat
          • 52;Sura At-Tur
          • 53;Sura An-Najm
          • 54;Sura Al-Qamar
          • 55;Sura Ar-Rahman
          • 56;Sura Al-Waqia
          • 57;Sura Al-Hadid
          • 58;Sura Al-Mujadilah
          • 59;Sura Al-Hashr
          • 60;Sura Al-Mumtahina
        • Sura No 61 to 75 >
          • 61;Sura As-Saff
          • 62;Sura Al-Jumuah
          • 63;Sura Al-Munafiqun
          • 64;Sura At-Taghabun
          • 65;Sura At-Talaq
          • 66;;Sura At-Tahrim
          • 67;Sura Al-Mulk
          • 68;Sura Al-Qalam\Nun
          • 69;Sura Al-Haqqa
          • 70;Sura Al-Maarij
          • 71;Sura Nuh
          • 72;Sura Al-Jinn
          • 73;Sura Al-Muzzammil
          • 74;Sura Al-Muddathir
          • 75;Sura Al-Qiyama
        • Sura No 76 to 90 >
          • 76;Sura Al-Insan\Ad-Dahr
          • 77;Sura Al-Mursalat
          • 78;Sura An-Naba
          • 79;Sura Al-Naziat
          • 80;Sura Abasa
          • 81;Sura At-Takwir
          • 82;Sura Al-Infitar
          • 83;Sura Al-Mutaffifin
          • 84;Sura Al-Inshiqaq
          • 85;Sura Al-Burooj
          • 86;Sura At-Tariq
          • 87;Sura Al-Ala
          • 88;Sura Al-Ghashiya
          • 89;Sura Al-Fajr
          • 90;Sura Al-Balad
        • Sura No 91 to 100 >
          • 91;Sura Ash-Shams
          • 92;Sura Al-Lail
          • 93;Sura Ad-Dhuha
          • 94;Sura Al-Inshirah
          • 95;Sura At-Tin
          • 96;Sura Al-Alaq
          • 97;Sura Al-Qadr
          • 98;Sura Al-Bayyina
          • 99;Sura Az-Zalzala
          • 100;Sura Al-Adiyat
        • Sura No 101 to 114 >
          • 101;Sura Al-Qaria
          • 102;Sura At-Takathur
          • 103;Sura Al-Asr
          • 104;Sura Al-Humaza
          • 105;Sura Al-Fil
          • 106;Sura Quraysh
          • 107;Sura Al-Ma'un
          • 108;Sura Al-Kawthar
          • 109;Sura Al-Kafirun
          • 110;Sura An-Nasr
          • 111;Sura Al-Masadd
          • 112;Sura Al-Ikhlas
          • 113-114;Sura Al-Falaq & Sura Al-Nas
      • Hadith >
        • Forty Sacred Hadith Qudsi
      • Biography >
        • Brief Biography of Hazrat Mohammad (Peace Be Upon Him)
        • Parents Of Hazrat Muhammad (P.B.U.H)
        • Umm-al-Momineen
        • Daughters Of Hazrat Mohammad (P.B.U.H)
        • Sons Of Mohammad (Peace Be Upon Him)
        • Companions of Prophet Mohammad (Peace Be Upon Him) >
          • Rightly Guided Caliphs >
            • Brief Biography of Abu Bakr As-Siddiq
            • Life of Umar ibn Al-Khattab
            • Life Of Uthman ibn Affan
            • Life of Ali ibn Abi Talib
          • Life of Al-Hussein Ibn Ali Ibn Abi Talib
      • Articles of Faith
      • Pillars of Islam >
        • Sawm\\Fasting In Islam
        • Zakat\\Alms-giving In Islam
        • Hajj\\Pilgrimage In Islam
      • Holiest sites in Islam >
        • Holy Kaaba
        • Al-Masjid Al-Haram
        • Al-Masjid Al-Nabawi
        • Al-Masjid Al-Aqsa
        • Dome Of The Rock
        • Quba Mosque
        • Masjid E-Zil-Qiblatain
        • Umayyad Mosque
        • Great Mosque of Aleppo
        • Imam Ali Mosque
        • Masjid Al-Kufa
        • Khalid Ibn Al-Walid Mosque
        • Imam Husayn Shrine
        • Al-Abbas Mosque
        • Al-Askari Mosque
        • Al-Kadhimiya Mosque
        • Imam Reza Shrine
        • Abu Hanifah Mosque
        • Zamzam Well
      • Festivals and Events >
        • Eid Milad an-Nabi (Peace Be Upon Him)
        • Isra and Miraj
        • Shab-e-Barat
        • Laylat Al-Qadr
        • Eid ul-Fitr
        • Eid ul-Adha
      • Islamic Calendar >
        • About Islamic Calendar
        • 1.Muharram
        • 2.Safar
        • 3.Rabi al-Awwal
        • 4.Rabi al-Thani
        • 5.Jumada al-Awwal
        • 6.Jumada al-Thani
        • 7.Rajab
        • 8.Shaaban
        • 9.Ramadan
        • 10.Shawwal
        • 11.Dhu al-Qidah
        • 12.Dhu al-Hijjah
      • Divine Books In Islam
      • Wonders of Muslim >
        • Wonders Of Muslim (Mosque, Picture hyperlink)
        • 15 World Largest Mosques By Area
        • 15 World Largest Mosques By Capacity
        • Largest Mosque By Country In Terms of Area
        • Largest Mosque By City In Terms of Area
        • In Asia >
          • Middle East >
            • In Saudi Arabia >
              • Al-Masjid Al-Haram
              • Al-Masjid Al-Nabawi
              • Quba Mosque
              • Masjid E-Zil-Qiblatain
            • In Iraq >
              • Imam Ali Mosque
              • Imam Husayn Shrine
              • Al-Abbas Mosque
              • Al-Askari Mosque
              • Abu Hanifah Mosque
              • Al-Kadhimiya Mosque
              • Masjid Al-Kufa
              • Great Mosque of Samarra
            • In Syria >
              • Umayyad Mosque
              • Great Mosque of Aleppo
              • Khalid Ibn Al-Walid Mosque
            • Imam Reza Shrine
            • Al-Masjid Al-Aqsa
            • Sheikh Zayed Grand Mosque
            • Al-Fateh Mosque
            • Saleh Mosque
            • Sultan Qaboos Grand Mosque
            • Grand Mosque of Kuwait
            • Imam Muhammad ibn Abd al-Wahhab Mosque
          • South Asia >
            • Faisal Mosque
            • Badshahi Mosque
            • Wazir Khan Mosque
            • Grand Jamia Mosque
            • Baitul Mukarram
            • Wazir Khan Mosque
            • Shah Jahan Mosque, Thatta
            • Bhong Mosque
            • Mohabbat Khan Mosque
            • Masjid-i Jahan-Numa
            • Jamia Masjid, Srinagar
          • Southeast Asia >
            • Crystal Mosque
            • Istiqlal Mosque
            • Jame Asr Hassanil Bolkiah Mosque
            • National Mosque of Malaysia
            • Putra Mosque
            • Sultan Salahuddin Abdul Aziz Shah Mosque
            • Sultan Omar Ali Saifuddin Mosque
          • East Asia >
            • Id Kah Mosque
            • Great Mosque of Guangzhou
            • Taipei Grand Mosque
            • Kowloon Mosque and Islamic Centre
          • Central Asia >
            • Nur-Astana Mosque
            • Bibi-Khanym Mosque
        • In Africa >
          • Abu Al-Abbas Al-Mursi Mosque
          • Al-Azhar Mosque
          • Al-Zaytuna Mosque
          • Great Mosque of Djenne
          • Hassan II Mosque
          • Koutoubia Mosque
          • Mosque of Ahmad Ibn Tulun
          • Mosque of Amr Ibn Al-As
          • Mosque of Muhammad Ali Pasha
          • Mosque of Uqba
          • Uganda National Mosque
        • In America & Europe >
          • King Fahd Islamic Cultural Center
          • Sabancı Merkez Camii
          • Glasgow Central Mosque
          • Blue Mosque
          • Mosque of Rome
          • Qolsharif Mosque
          • Kocatepe Mosque
      • Wonder Of Muslims (Fort,Palace)
    • Islamic Pictorial >
      • Verse from the Holy Quran
      • Saying of The Prophet Mohammad
      • Wise Words
      • The Six Kalimas
      • Masnoon Dua
      • Sisala Azkar Masonna
      • Life of Mohammad (Peace Be Upon Him)
      • Notes
    • Islamic Videos >
      • Verse from the Holy Quran
      • Saying of The Prophet Mohammad
      • Hamds and Naats
    • Islamic Sounds
    • Islamic Wallpapers >
      • Bismillah
      • Kalma Tayyaba
      • Allah
      • Mohammad Peace Be Upon Him
      • Eid ul-Fitr
      • Lailat al-Baraa
      • Hajj
      • Ramadan
  • World
    • Articles >
      • Geography >
        • Continents of the World >
          • About Continents
          • Asia
          • Africa
          • North America
          • South America
          • Antarctica
          • Europe
          • Oceania
        • New Seven Wonders of Nature
        • Earth's Oceans
        • Biggest Bodies Of Water....After Ocean
        • Longest Mountain Ranges Of The World
        • 10 Highest Mountains
        • Seven Summits
        • Volcanic Seven Summits
        • Eight Lowest Points On Earth
        • Lowest Point By Continent (Below Sea Level)
        • Longest River By Continent
        • Largest Lakes by Continent
        • Biggest Desert In The World
      • International Organizations and Groups >
        • International Organizations >
          • United Nations (UNO)
          • Organisation of Islamic Cooperation (OIC)
          • Interpol
        • Regional Organizations >
          • Arab League
          • OPEC (Organization of Petroleum Exporting Countries)
          • South Asian Association for Regional Cooperation (SAARC)
          • Commonwealth of Nations
          • Association of Southeast Asian Nations (ASEAN)
          • Economic Cooperation Organization (E.C.O)
          • Shanghai Cooperation Organisation (SCO)
      • Extreme Engineering >
        • Seven Wonders of the Ancient World
        • New Seven Wonders of the World
        • Biggest,Largest Structures In World----Man Made
        • Tallest Structures In The World ---- Man Made
      • House of Records >
        • Biggest Bodies Of Water....After Ocean
        • Longest Mountain Ranges Of The World
        • 10 Highest Mountains
        • Seven Summits
        • Volcanic Seven Summits
        • Eight Lowest Points On Earth
        • Lowest Point By Continent (Below Sea Level)
        • Longest River By Continent
        • Largest Lakes by Continent
        • Biggest Desert In The World
        • Top 10 Largest Countries By Area
        • Top 10 Smallest Countries By Area
        • Top 10 Most Populated Countries
        • Top 10 Most Less Populated Countries
        • Biggest,Largest Structures In World----Man Made
        • Tallest Structures In The World-------Man Made
      • Festivals and Events >
        • Valentine's Day
        • International Mother Language Day
        • International Women's Day
        • Earth Hour
        • April Fools' Day
        • International Workers' Day
        • Mother's Day
        • World No Tobacco Day
        • Father's Day
        • International Friendship Day
        • Cricket World Cup
        • Summer Olympic Games
      • National Symbols >
        • National Trees
        • National Fruits
        • National Sport
        • National Birds
      • World languages >
        • Arabic
        • Balochi
        • Pashto
        • Punjabi
        • Sindhi
        • Urdu
      • Games And Sports >
        • Archery
        • Badminton
        • Cricket
        • Weightlifting
      • Scouting >
        • Boy Scouts
        • Girl Guides
      • Days and Months >
        • Days of the Week
        • April In History?
        • May In History
        • Calendar >
          • Islamic Calendar >
            • About Islamic Calendar
            • 1.Muharram
            • 2.Safar
            • 3.Rabi al-Awwal
            • 4.Rabi al-Thani
            • 5.Jumada al-Awwal
            • 6.Jumada al-Thani
            • 7.Rajab
            • 8.Shaaban
            • 9.Ramadan
            • 10.Shawwal
            • 11.Dhu al-Qidah
            • 12.Dhu al-Hijjah
          • Gregorian Calendar >
            • About Gregorian Calendar
            • 1.January
            • 2.February
            • 3.March
            • 4.April
            • 5.May
            • 6.June
            • 7.July
            • 8.August
            • 9.September
            • 10.October
            • 11.November
            • 12.December
      • The Solar System (Planets & Dwarf Planets)
      • Introduction and History Of Money
    • Pictorial Series >
      • Did You Know?
      • Wise Words
      • Landscape & Landmark
    • Videos >
      • Did You Know?
      • Universe
      • Human Body
  • Pakistan
    • Articles >
      • Geographical >
        • 5 Highest Peaks In Pakistan
        • Rivers In Pakistan
        • Deserts Of Pakistan
        • Lakes In Pakistan
      • Cities In Pakistan >
        • Islamabad
        • Karachi
        • Lahore
        • Quetta
        • Peshawar
        • Faisalabad
        • Multan
        • Murree
      • Places of Interest >
        • Mosque >
          • Faisal Mosque
          • Badshahi Mosque
          • Grand Jamia Mosque
          • Wazir Khan Mosque
          • Shah Jahan Mosque, Thatta
          • Bhong Mosque
          • Mohabbat Khan Mosque
        • Mausoleum >
          • Tomb of Jahangir
          • Tomb of Nur Jahan
          • Mazar-e-Quaid
          • Tomb of Allama Mohammad Iqbal
        • Walled City of Lahore
        • Pakistan Monument
        • Minar-e-Pakistan
        • Lahore Fort
        • Iqbal Manzil
        • Shalimar Gardens
        • Hiran Minar
      • Languages of Pakistan >
        • Urdu
        • Punjabi
        • Sindhi
        • Pashto
        • Balochi
      • Mode of Transport >
        • Motorways of Pakistan
        • Karakoram Highway
        • Grand Trunk Road "Or" GT Road
      • National Events >
        • Lahore Resolution
        • Pakistan Day
        • Youm-e-Takbir
        • Pakistan's Independence Day
        • Defence Day
      • Scouting In Pakistan >
        • Scout
        • Girl Guide
      • Nishan-e-Haider
      • National Symbols of Pakistan
      • Pakistani Currency
      • Guinness Book of World Records In Sport By Pakistan
    • Pakistani Videos
  • Links
  • Feedback
  • Site Map
  • InfopediaPk blog

Gregorian calendar

Used By
Other Name
Total Number Of Days In A Year

Total Number Of Month In A Year
Abbreviated as
Adopted By
Made Offical On
First Day
Suggestion to start calender
Western world and almost World Wide
Gregorian calendar,Western calendar or Christian calendar 
If February has 28 days, then 365 days,If February has 29 days,then 366 days 
12
AD or A.D (Anno Domini) and BC or B.C.(Before Christ)
Pope Gregory XIII
February 24, 1582
Friday, 15 October 1582
Neapolitan doctor Aloysius Lilius

The Gregorian calendar, also known as the Western calendar, or Christian calendar (Arabic:تقويم ميلادي,Persian:گاه‌شماری میلادی,Urdu:عیسوی تقویم) is the calendar that is used throughout most of the Western world and almost world wide. It began to be used from 1582. It replaced the previous Julian calendar because the Julian Calendar had an error: it added a leap year (with an extra day every four years) with no exceptions. The length of the Julian year was exactly 365.25 days, but the actual time it takes for the Earth to go around the Sun once is closer to 365.2425 days, 365 & 6 hours. This difference is just over ten minutes each year.
This made the seasons get out of track, since the real first day of spring in western Europe (The equinox - day and night the same length) was happening earlier and earlier before the traditional March 21 as the centuries went by. By the 1500s, it was starting around March 11, ten days 'Too early' according to the calendar. So what they did was to move the calendar forward ten days in 1582, and at the same time to make sure it did not happen again. To do this, they made an exception to the previous 'leap year rule' (Add February 29 every four years). There would be no February 29 for every year that ends in 00 - unless it could be divided by 400. So the year 2000 was a leap year anyway, because it can be divided by 400, but 2100, 2200, and 2300 will be common years, with no February 29.
It was first suggested by the Neapolitan doctor Aloysius Lilius, and was made official by Pope Gregory XIII, for whom it was named, on February 24, 1582.
The Gregorian calendar continued the previous year-numbering system (Anno Domini), which counts years from the traditional Incarnation of Jesus, and which had spread throughout Europe during the Middle Ages. This year-numbering system is the predominant international standard today.

History

Picture
Pope Gregory XIII
The motivation of the Catholic Church in adjusting the calendar was to celebrate Easter at the time it thought the First Council of Nicaea had agreed upon in 325. Although a canon of the council implies that all churches used the same Easter, they did not. The Church of Alexandria celebrated Easter on the Sunday after the 14th day of the moon (Computed using the Metonic cycle) that falls on or after the vernal equinox, which they placed on 21 March. However, the Church of Rome still regarded 25 March as the equinox (Until 342) and used a different cycle to compute the day of the moon.In the Alexandrian system, since the 14th day of the Easter moon could fall at earliest on 21 March its first day could fall no earlier than 8 March and no later than 5 April. This meant that Easter varied between 22 March and 25 April. In Rome, Easter was not allowed to fall later than 21 April, that being the day of the Parilia or birthday of Rome and a pagan festival. The first day of the Easter moon could fall no earlier than 5 March and no later than 2 April. Easter was the Sunday after the 15th day of this moon, whose 14th day was allowed to precede the equinox. Where the two systems produced different dates there was generally a compromise so that both churches were able to celebrate on the same day. By the 10th century all churches (Except some on the eastern border of the Byzantine Empire) had adopted the Alexandrian Easter, which still placed the vernal equinox on 21 March, although Bede had already noted its drift in 725—it had drifted even further by the 16th century.
Worse, the reckoned Moon that was used to compute Easter was fixed to the Julian year by a 19 year cycle. However, that approximation built up an error of one day every 310 years, so by the 16th century the lunar calendar was out of phase with the real Moon by four days.
The Council of Trent approved a plan in 1563 for correcting the calendrical errors, requiring that the date of the vernal equinox be restored to that which it held at the time of the First Council of Nicaea in 325 and that an alteration to the calendar be designed to prevent future drift. This would allow for a more consistent and accurate scheduling of the feast of Easter.
The fix was to come in two stages. 
First, it was necessary to approximate the correct length of a solar year. The value chosen was 365.2425 days in decimal notation.Although close to the mean tropical year of 365.24219 days, it is even closer to the mean vernal equinox year of 365.2424 days;this fact made the choice of approximation particularly appropriate as the purpose of creating the calendar was to ensure that the vernal equinox would be near a specific date (21 March).
The second stage was to devise a model based on the approximation which would provide an accurate yet simple, rule-based calendar. The formula designed by Aloysius Lilius was ultimately successful. It proposed a 10-day correction to revert the drift since Nicaea, and the imposition of a leap day in only 97 years in 400 rather than in 1 year in 4. To implement the model, it was provided that years divisible by 100 would be leap years only if they were divisible by 400 as well. So, in the last millennium, 1600 and 2000 were leap years, but 1700, 1800 and 1900 were not. In this millennium, 2100, 2200, 2300, 2500, 2600, 2700, 2900, and 3000, will not be leap years, but 2400, and 2800 will be. This theory was expanded upon by Christopher Clavius in a closely argued, 800 page volume. He would later defend his and Lilius's work against detractors.
The 19-year cycle used for the lunar calendar was also to be corrected by one day every 300 or 400 years (8 times in 2500 years) along with corrections for the years (1700, 1800, 1900, 2100 et cetera) that are no longer leap years. In fact, a new method for computing the date of Easter was introduced.
In 1577 a Compendium was sent to expert mathematicians outside the reform commission for comments. Some of these experts, including Giambattista Benedetti and Giuseppe Moleto, believed Easter should be computed from the true motions of the sun and moon, rather than using a tabular method, but these recommendations were not adopted.
 Pope Gregory XIII dropped 10 days to bring the calendar back into synchronization with the seasons. Lilius originally proposed that the 10-day correction should be implemented by deleting the Julian leap day on each of its ten occurrences during a period of 40 years, thereby providing for a gradual return of the equinox to 21 March. However, Clavius's opinion was that the correction should take place in one move, and it was this advice which prevailed with Gregory. Accordingly, when the new calendar was put in use, the error accumulated in the 13 centuries since the Council of Nicaea was corrected by a deletion of ten days. The last day of the Julian calendar was Thursday, 4 October 1582 and this was followed by the first day of the Gregorian calendar, Friday, 15 October 1582 (The cycle of weekdays was not affected).

Time Line Of Adoption

Picture

Months In Year

No 

1
2
3
4
5
6
7
8
9
10
11
12

Month 

January
February 
March 
April 
May 
June 
July 
August 
September 
October 
November 
December 

Name Came From

Janus (Roman god of gates, doorways, beginnings and endings)
Latin term februum, which means purification
Mars (Roman god of war)
Latin Word Aperire, "To open,"
Maia Maiestas (Roman goddess)
Juno (Roman goddess, wife of Jupiter)
Julius Caesar (Roman dictator) 
Augustus (first Roman emperor) 
Septem (Latin for seven)
Octo (Latin for eight)
Novem (Latin for nine)
Decem (Latin for ten)

Days 

31 days
28 or 29 days
31 days
30 days
31 days
30 days
31 days
31 days
30 days
31 days
30 days
31 days

Accuracy

The Gregorian calendar improves the approximation made by the Julian calendar by skipping three Julian leap days in every 400 years, giving an average year of 365.2425 mean solar days long.This approximation has an error of about one day per 3,300 years with respect to the mean tropical year. However, because of the precession of the equinoxes, the error with respect to the vernal equinox (Which occurs, on average, 365.24237 days apart near 2000) is 1 day every 7,700 years. By any criterion, the Gregorian calendar is substantially more accurate than the 1 day in 128 years error of the Julian calendar (Average year 365.25 days).
In the 19th century, Sir John Herschel proposed a modification to the Gregorian calendar with 969 leap days every 4000 years, instead of 970 leap days that the Gregorian calendar would insert over the same period.This would reduce the average year to 365.24225 days. Herschel's proposal would make the year 4000, and multiples thereof, common instead of leap. While this modification has often been proposed since, it has never been officially adopted.
On time scales of thousands of years, the Gregorian calendar falls behind the seasons because the slowing down of the Earth's rotation makes each day slightly longer over time  while the year maintains a more uniform duration. Borkowski reviewed mathematical models in the literature, and found the results generally fall between a model by McCarthy and Babcock, and another by Stephenson and Morrison. If so, in the year 4000, the calendar will fall behind by at least 0.8, but less than 1.1 days. In the year 12,000 the calendar would fall behind at least 8, but less than 12 days.
Powered by Create your own unique website with customizable templates.