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Time evolution operator
The time evolution operator, also called the time-propagator, is the unitary operator that carries a quantum state from an initial time to a later time, solving the Schrödinger equation.
Time Factors
Time Factors (MeSH D013997) is a National Library of Medicine indexing descriptor for limited time intervals contributing to results, used across epidemiology, cohort studies, and longitudinal research on timing and temporal design.
Time Fades Away
Time Fades Away is Neil Young's 1973 live album with the Stray Gators, recorded on the 62-show Harvest tour; all eight songs were previously unreleased, and it stayed out of print until 2017 CD reissue.
Time for Revenge
Time for Revenge (Tiempo de revancha) is Adolfo Aristarain's 1981 Argentine political thriller starring Federico Luppi as an explosives expert who fakes muteness after a staged mining accident to extort the corrupt Tulsaco company; it won the Havana Grand Coral and seven Silver Condors.
Time formatting and storage bugs
Time formatting and storage bugs are software defects in how dates and times are represented, stored, or formatted, firing on a calendar date to produce wrong dates.
Time geography
Time geography is a framework in human geography, developed by Torsten Hägerstrand in 1970, that analyzes how people's activities and travel are constrained by time and space.
Time headway
Time headway is the time between two successive vehicles passing the same point on the same lane of a road, measured from the same feature of both vehicles.
Time Heist
Time Heist (Doctor Who Series 8, Episode 5, BBC One, 20 September 2014), written by Steve Thompson and Steven Moffat, directed by Douglas Mackinnon: the Twelfth Doctor robs the most dangerous bank in the cosmos, drawing 4.93m overnight UK viewers.
Time history analysis
Time history analysis is a seismic analysis method that computes a structure's displacement, velocity, and acceleration at every time step under a recorded or simulated ground motion.
Time in a Bottle
Time in a Bottle: Jim Croce ballad written December 1970 for his pregnant wife Ingrid, recorded October 11, 1971 at The Hit Factory, and posthumously number one on the Billboard Hot 100 for the chart week of December 29, 1973.
Time in Arizona
Time in Arizona is Mountain Standard Time (UTC−7) year-round for almost the entire state, making it one of two US states, with Hawaii, that do not observe daylight saving time.
Time in Australia
Time in Australia, also called time zones in Australia, spans three standard UTC offsets, growing to five in summer when southeastern states observe daylight saving.
Time in Brazil
Time in Brazil, also called the time zones of Brazil, is set in four zones from UTC−2 to UTC−5; Brasília Time (UTC−3) covers about 93.3 percent of the population.
Time in British Columbia
Time in British Columbia is governed by provincial law, which since 2026 has kept most of the province on permanent Pacific Time, UTC-7, ending daylight saving changes.
Time in Canada
Time in Canada, or Canadian time zones, covers six main time zones spanning about 4.5 hours, with official time defined by the National Research Council's atomic clocks.
Time in China
Time in China is kept on a single time zone, UTC+8, called China Standard Time internationally and Beijing Time domestically, despite spanning five ideal zones.
Time in Germany
Time in Germany, also known as Berlin Time, is Central European Time (UTC+1), with summer time (CEST, UTC+2); a unified legal time was adopted by law in 1893.
Time in India
Time in India follows Indian Standard Time (IST; Hindi: भारतीय मानक समय), a single time zone at UTC+5:30 maintained by CSIR-NPL in New Delhi, with no daylight saving time.
Time in Indiana
Time in Indiana is split: most of the state uses Eastern time while 12 counties use Central time, and daylight saving time is observed statewide.
Time in Indonesia
Time in Indonesia is kept in three zones, WIB (UTC+7), WITA (UTC+8), and WIT (UTC+9), set by Presidential Decree in 1988, with no daylight saving time.
Time in Mexico
Time in Mexico uses four time zones, from UTC−5 in Quintana Roo to UTC−8 in Baja California, set by a 2022 law that ended daylight saving time.
Time in New Zealand
Time in New Zealand is governed by New Zealand Standard Time (NZST), set 12 hours ahead of UTC, with the Chatham Islands 45 minutes ahead and daylight saving in summer.
Time in physics
Time in physics, also called the physics of time, is the quantity that orders physical events and enters physical laws, measured by comparing durations against atomic clocks.
Time in Russia
Time in Russia, also called time zones of Russia, spans 11 zones from UTC+2 to UTC+12, with Moscow Time (UTC+3) as the reference and no daylight saving time since 2014.
Time in Spain
Time in Spain uses two official time zones: UTC+1 (Central European Time) for the mainland, Balearic Islands, Ceuta, and Melilla, and UTC+0 for the Canary Islands.
Time in the United Kingdom
Time in the United Kingdom is legally based on Greenwich Mean Time, the legal time of Great Britain since 1880, with clocks moving to British Summer Time each summer.
Time in the United States
Time in the United States is kept through federal standard time zones and daylight saving time, with NIST and the Naval Observatory serving as official timekeepers.
Time Inc.
Time Inc., the American magazine publisher founded by Henry Luce and Briton Hadden in 1922, published Time, Fortune, Life, Sports Illustrated, and People, merged into Time Warner in 1990, and was sold to Meredith in 2018.
Time inconsistency
Time inconsistency is the property of a policy that looks optimal when announced but no longer when carried out, formalized by Kydland and Prescott in 1977.
Time Lapse (film)
Time Lapse is a 2014 American sci-fi thriller directed by Bradley King, written with BP Cooper, in which three roommates exploit a camera that photographs 24 hours into the future; released theatrically in 2015 by XLrator Media.