0 (year)

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2012 phenomenon

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365 (number)

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46 BC

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4–4–5 calendar

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Ab urbe condita

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Aban (month)

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Advent calendar

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Ancient Macedonian calendar

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Anno Domini

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Anno Mundi

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Ante Christum natum

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Anywhere on Earth

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Armelin's calendar

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Astronomical year numbering

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Attic calendar

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Ayyám-i-Há

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Bahman

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Calendar (New Style) Act 1750

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Calendar of saints

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Calendar reform

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Callippic cycle

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Caspian calendar

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Century leap year

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Chinese New Year

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Chinese calendar

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Choghadiya

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Chronography of 354

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Civil calendar

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Coligny calendar

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Common Era

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Common year starting on Saturday

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Common year starting on Sunday

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Common year starting on Thursday

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Common year starting on Tuesday

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Common year starting on Wednesday

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Computus

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Cosmic Calendar

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Date-time group

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Day count convention

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December solstice

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Decree of Canopus

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Determination of the day of the week

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Deva Soye

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Dey (month)

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Dieux du Stade

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Docket (court)

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Dominical letter

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Dori

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Dreamspell

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Earthly Branches

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Ecclesiastical full moon

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Edict of Roussillon

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Egyptian calendar

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Epact

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Eponym dating system

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Era of Martyrs

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Esfand

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Ethiopian calendar

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Farvardin

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Fasli Calendar

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Fasti

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February 30

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Folk saint

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French Republican Calendar

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Gaussian year

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Greenwich Mean Time

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ICalendar

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ISO 8601

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International Fixed Calendar

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Invariable Calendar

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January 0

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Jewish Talmudic Calendar

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Khordad

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Korean calendar

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Laterculus

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Leap year bug

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Leap year starting on Tuesday

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Leap year starting on Wednesday

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Legal year

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Liturgy of St James

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Local mean time

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Losar

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Luba calendar

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Lunar New Year

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Madala Panji

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March 0

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Marcus Bains line

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Maya calendar

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Mehr (month)

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Men for All Seasons

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Metonic cycle

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Middle-earth calendar

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Mordad

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Name days in Slovakia

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Nepal Sambat

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New Year

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North Korean calendar

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Nude calendar

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Octaeteris

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Octave (liturgical)

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Old Calendarists

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Ordibehesht

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Ordinal date

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Orthodox wall calendar

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Perennial calendar

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Pirelli Calendar

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Pisan calendar

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Pompeian era

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Proleptic calendar

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Public holidays in Ivory Coast

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Quarter days

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Qumran calendrical texts

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Rata Die

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Reform of the date of Easter

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Rolling 12 month period

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Roman calendar

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Rosh Chodesh

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Royal stars

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Rumi calendar

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Runic calendar

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Saros (astronomy)

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Season of the Emergence

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Seleucid era

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Shahrivar

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Shaka era

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Solar cycle (calendar)

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Solar time

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Sothic cycle

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Soviet calendar

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Spanish era

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Spring (season)

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Stardate

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Sun path

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Swedish calendar

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Symmetry454

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Tamil calendar

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Tammuz (Babylonian calendar)

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Telugu years

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Thai solar calendar

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The Darker Image

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The OC wall calendar

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The Remaining Signs of Past Centuries

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The girls of Ryanair

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Thirty days hath September

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Tibetan calendar

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Timekeeping on Mars

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Tir (month)

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Tirhuta Panchang

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Tishri-years

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Tonalpohualli

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Tzolk'in

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Tết

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UN Arabic Language Day

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UN Chinese Language Day

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UN English Language Day

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UN French Language Day

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UN Russian Language Day

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UN Spanish Language Day

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Victoria Day

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Vikram Samvat

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Wall calendar

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Water year

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Weather lore

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Wheel of the Year

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Winter count

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World Calendar

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Xiuhpohualli

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Y1C Problem

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Year 10,000 problem

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Year 2000 problem

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Year 2038 problem

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Yele Sambat

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Zamenhof Day

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Zeller's congruence

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Zoroastrian calendar

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