a-series and b-series ab urbe condita abraha absolute dating absolute time and space aeternitas al-fil ali allah amino acid dating ancient of days anna perenna anno domini anno mundi antevorte arabic language archaeology archaeomagnetic dating arguments for eternity armenian calendar arrow of time ashima assyrian calendar astrarium astronomical chronology astronomical year numbering astronomy atomic clock atropos attic calendar b-theory of time babylonian calendar balinese calendar barycentric coordinate time barycentric dynamical time battle of badr battle of uhud battle of the trench before present bengali calendar berber calendar bikram samwat buddhism buddhist calendar calculating the day of the week calendar calendar era calendar of saints calendar round caliph camenae canon of kings carmenta carpe diem causality celtic calendar century chinese calendar chinese era name christianity chronicle chronobiology chronology chronometry chronon chronos chronostratigraphy circa circadian rhythm civil time clock clotho common era computus continuous signal coordinate time coordinated universal time coptic calendar cosmic calendar cosmological decade cosmology dagr darian calendar day daylight saving time days of the week decade deep time dendrochronology destiny dhu al-hijjah discordian calendar discrete time divination dominical letter dreamtime duration easter easter controversy eastern arabic numerals eastern orthodox liturgical calendar economic calendar egypt egyptian calendar egyptian chronology eid al-adha eid al-ghadeer elephant elli encyclopaedia of islam endurantism epact ephemeris ephemeris time equation of time equinox era eschatology eternal return eternity ethiopia ethiopian calendar european council for fatwa and research father time fiqh council of north america floruit fortnight fortuna four dimensionalism fourth dimension future futurology galactic year geocentric coordinate time geochronology geologic time scale geological history of earth geology geras germanic calendar glottochronology gravitational time dilation greenwich mean time gregorian calendar hajj hebrew calendar hebrew language hellenic calendars hemsut hexadecimal time hijri year hindu calendar hindu units of measurement hinduism history history of timekeeping devices horae horology hour hourglass husayn ibn ali iso week date ice core immortality incremental dating india indian national calendar indonesia intercalation international atomic time international commission on stratigraphy international date line international earth rotation and reference systems service iranian calendar irish calendar ishtar islam islamic new year islamic society of north america isotope geochemistry japanese calendar japanese era name javanese calendar jewish holiday jordan judaism julian calendar jumada al-awwal jumada al-thani kaaba kalachakra kan-laon korean calendar korean era name kuwaiti algorithm latin lauma law of superposition laylat al-qadr leap second leap year lichenometry limmu list of calendars lithuanian calendar liturgical year long now foundation lunar calendar lunisolar calendar lustrum maitreya malayalam calendar malaysia mamitu mammetun manu the great manvantara marine chronometer matres and matrones mawlid maya calendar mecca medina mental chronometry mesoamerican long count calendar metonic cycle metric time metrology microsoft milankovitch cycles millennium minguo calendar minute moirae molecular clock month mosque moveable feast muhammad muharram muslim muslim holidays mythology nanakshahi calendar nepal sambat new chronology newtonian time in economics norns norse mythology nortia nuclear time scale old style and new style dates optical dating oracle oracle bone pakistan paleomagnetism paleontology papyrus parcae passover past pentecontad calendar perdurantism periodization perpetual calendar persian language philosophy of space and time planck epoch planck time porrima portable document format postverta predestination predestination in islam present prime meridian proleptic gregorian calendar proleptic julian calendar proper time prophecy quartodecimanism radio clock radiocarbon dating radiometric dating rajab ramadan rapa nui calendar reaction time reform of the date of easter regnal year relative dating religion revised julian calendar roman calendar rumi calendar runic calendar sabbath in christianity saeculum safar sahih muslim samarium-neodymium dating saudi arabia second seleucid era sense of time sexagenary cycle shabbat shawwal sidereal time solar calendar solar time solstice sothic cycle soviet calendar space spacetime spanish era specious present sudz sumarr and vetr sunan al-tirmidhi sundial sura synchronoptic view system time t-symmetry tabular islamic calendar tamil calendar temporal finitism temporal parts tempus fugit tephrochronology terrestrial time thai lunar calendar thai solar calendar the farewell pilgrimage the farewell sermon the remaining signs of past centuries the unreality of time theory of relativity thermoluminescence dating tibetan calendar time time-based currency time banking time capsule time dilation time discipline time domain time in physics time offset time signature time standard time travel time use research time value of money time zone timekeeper timeline tinia tonalpohualli traditional burmese calendar tropical year turkish language tyche umar umm al-qura universal time uranium-lead dating urdu ursitoare uthman ibn affan vertumnus wall calendar watch water clock week western world wheel of time xhosa calendar xiuhpohualli year year of the elephant year zero yemen yuga zoroastrian calendar