what does am and pm stand for
12-hour clock
The 12-hour clock is a time convention in which the 24 hours of the day are divided into two periods: a.m. (from the Latin ante meridiem, meaning "before midday") and p.m. (post meridiem, "after midday").
12-hour clock Glossary of baseball terms Clock Tartan Sundial English language Acronym Hour Observance of Christmas by country Television in the United States Light in painting Apostrophe History of Western civilization List of US Navy ships sunk or damaged in action during World War II Canadian English Development communication List of Supernatural and The Winchesters characters Millennials List of Supernatural characters List of Dutch inventions and innovations Miscegenation 24-hour clock Date and time notation in the United States Keyboard layout History of timekeeping devices General der Nachrichtenaufklärung Culture of the United Kingdom Dubbing 24-hour analog dial Hungarian orthography Chinese characters History of Australia Translation German radio intelligence operations during World War II Blueberry (comics) Slavery in ancient Rome Economic history of the United Kingdom Bible-Presbyterian churches (Singapore) List of country-name etymologies History of opera Clavier-Übung III Sanskrit South African labour law Imperial Roman army Role of Christianity in civilization Language Institutional racism Vilnius Bo (parashah) Arabic Literacy European Union law Luftnachrichten Abteilung 350 Responses to the COVID-19 pandemic in April 2020 History of the nude in art List of placeholder names by language Women in Islam Contract Hugo W. Koehler United Kingdom labour law Daylight saving time Language and the euro Spacetime Latin tenses Ethnomusicology Surnames by country Positional notation UN offensive into North Korea QWERTY Hebrew calendar Full stop Anglo-Saxons The Dresden Files characters History of broadcasting in Australia German language History of the Netherlands John French, 1st Earl of Ypres H. H. Asquith Equation of time Reading Assassination of José Calvo Sotelo Brazilian Portuguese United Kingdom constitutional law The Spirit of the Age Text messaging WGN-TV Latin America Portuguese people Time History of Eglin Air Force Base French Resistance Fake news Cluedo (Australian game show) Roman numerals History of France Economic history of the United States Foreign relations of India History of science History of magic List of Assassin's Creed characters Generation Z in the United States Doctor (title) List of modern great powers Greece Sir Henry Wilson, 1st Baronet Blockade of Germany (1939–1945) Unicode South African contract law Academic degree United Kingdom–United States relations Slavic Native Faith History of Germany Slash (punctuation) Romance languages List of My Hero Academia characters Paris in the 18th century List of unusual units of measurement Uses of English verb forms History of socialism Maximilian I, Holy Roman Emperor Hungarian language History of the United Kingdom Glossary of British terms not widely used in the United States Spanish orthography List of Jimmy Fallon games and sketches HBO Fox Broadcasting Company South African criminal law History of science and technology in Africa Professional wrestling match types List of Pokémon anime characters List of recurring The Simpsons characters History of Austria Watch Time zone History of slavery National Football League on television Persecution of Christians Glossary of ancient Roman religion Women in science Glossary of French expressions in English Comparison of Portuguese and Spanish Imperial examination Lithuania Chronology of Shakespeare's plays American and British English spelling differences Enoch Powell Chernobyl disaster Romansh language Names and titles of God in the New Testament History of the Philippines Interracial marriage List of accidents and incidents involving military aircraft (1955–1959) Twitter Weather of 2010 Value-form Christopher Evans (outlaw) NFL on CBS World War II by country Singular they Grading systems by country ISO 8601 Social media Address Indonesian language History of women in the United States Springfield race riot of 1908 Decimal time Nothing Records Kanji History of Poles in the United States Constructive set theory Portugal Henry VI, Part 3 Android (operating system) Astronomical clock List of national capital city name etymologies Aircraft in fiction Italy Common law List of accidents and incidents involving military aircraft (1945–1949) Empire Dutch language Date and time representation by country Comparison of user features of messaging platforms Acorn Archimedes Latin WGN America Criminal procedure in South Africa Native Americans in the United States List of Latin-script digraphs Maximilien Robespierre K-pop Marriage Wartime sexual violence Logology (science) History of television Yom Kippur War Sardinian language 2003 invasion of Iraq Electronic cigarette and e-cigarette liquid marketing International Phonetic Alphabet Quotation mark History of mathematics New Year's Eve History of personal computers International Space Station England Antikythera mechanism Puerto Rico Indo-European migrations Esperanto Soap opera Sexuality in ancient Rome Maritime history of California Christian theology Tilde Snowy owl Presidency of Donald Trump Defamation 1st Maine Cavalry Regiment Periodic table Wales History of telephone numbers in the United Kingdom Industrial Revolution First Russian circumnavigation Women in music Evolution of languages Identity document Scotland History of painting Music Wikipedia Tesla Autopilot BDSM France Swahili grammar Palaeography Letter case Date of Easter Religious symbolism in the United States military TV Guide (magazine) Historikerstreit List of films considered the worst Political positions of Hillary Clinton List of The Great Food Truck Race episodes History of mathematical notation Steele dossier John von Neumann Erwin Rommel South African Border War Bachelor's degree Medical school Middle Persian Charles Lindbergh Spanish language List of accidents and incidents involving military aircraft (1960–1969) White-tailed eagle Timekeeping on Mars List of Discworld characters News Cold War History of Tunisia KOCO-TV Daniel H. Overmyer History of Guatemala Music of Cuba Ethiopia Networked advocacy Social media use by Donald Trump List of QWERTY keyboard language variants Sharia Date and time notation in the United Kingdom Fuzzy concept Anglo-Saxon settlement of Britain Linguistic development of Genie Grammatical gender ASCII List of accidents and incidents involving military aircraft (1950–1954) National identification number Sweden Hillary Clinton's tenure as Secretary of State Foreign policy of the Donald Trump administration Truck driver Long-eared owl History of Europe Andalusia First Russian Antarctic Expedition Arabs Attempts to overturn the 2020 United States presidential election United Kingdom BBC Television Shakespeare List of Little Britain characters Helios Brian Wilson Northern Ireland Cooper's hawk Europe Planet History of computing hardware Iran List of Alex Rider characters Soviet Union Roman Empire 1972 in the Vietnam War Television American frontier Ethnic groups in the Philippines Titanic Anglicanism Pope Pius XII Smartphone Armies in the American Civil War Oceania Nazi racial theories Israel History of American newspapers Royalty payment Maya civilization Dash Surname List of Mad Men characters Women in government Israeli occupation of the West Bank Computer Superstation United Russia Internet Religion in China Hispanic and Latino Americans Recorder (musical instrument) Academic term Macedonia naming dispute Ancient Rome Søren Kierkegaard Racism in the United States Magic square Tide Chinese Filipino The Doctor (Doctor Who) Joseph Stalin Tornado outbreak sequence of May 2003 Mohammad Reza Pahlavi Ki Tissa Morse code History of longitude Theodore Roosevelt Dominican Republic Algorithm Douglas MacArthur Japanese invasions of Korea (1592–1598) Christianity African Americans Henry VI, Part 1 History of the United States Quantitative genetics Islamic terrorism Facebook Arab citizens of Israel List of Fables characters Srebrenica massacre A Gest of Robyn Hode Va'etchanan Ancient Carthage Germanic peoples Pope John Paul II Professional wrestling History of Nigeria New Mexico Atomic bombings of Hiroshima and Nagasaki Michael Heseltine Indigenous Australians Generation Z English land law Cultural impact of Madonna History of Mexican Americans Cryptic crossword Racial views of Donald Trump History of Cumbria Byzantine music Lesbian Chess YouTube Battle of Britain Late Roman army Sexual harassment Evidence of common descent Border control Norway History of Poland Swan maiden Italian Americans Moon London United States Marine Corps Amphibious Reconnaissance Battalion Slavery Mojibake Origin of the Romanians List of historical acts of tax resistance Iran–Iraq War Wu Ding Code-switching Sculpture TBS (American TV channel) Maritime history Pakistan English plurals Cryptanalysis of the Enigma Chichewa tenses Russian language Egyptians BASIC interpreter King James Version Timeline for the day of the September 11 attacks Sephardic Jews History of Palestine Boris Johnson List of Garo characters NBC Sunday Night Football Criticism of Facebook Jean Giraud Kerala Moscow Pi Canonical hours Has Hlai grammar History of United States prison systems History of Transylvania History of the Southern United States List of Doctor Who universe creatures and aliens Christian culture Serbo-Croatian Latin obscenity History of Detroit Spanish dialects and varieties Seir Kieran GAA Timeline of the 2014 Gaza War Estonia The Idler (1758–1760) Typeface Glossary of jazz and popular music Women's rights Ellipsis Education in India Ferdinand Marcos Somalia 57th Medical Detachment Glossary of French criminal law 0 Nicolae Iorga Indigenous peoples of the Americas Catholic Church sexual abuse cases Second Boer War Lost television broadcast Indo-Aryan migrations Burmese language History of Lisbon National conventions for writing telephone numbers Havana Overview of gun laws by nation List of band name etymologies Carnival Islamic architecture History of libraries List of The Shield characters Eastern esotericism Origin of language Passaic station (Erie Railroad) United States labor law Nuclear program of Iran Epigraphy Japanese language Subprime mortgage crisis Middle Ages Jury Culture of England Socialism Culture of the United States Erasmus Hyphen Phonics Architecture of India Time discipline Responses to the COVID-19 pandemic in July 2020 Second Vatican Council Joint Comprehensive Plan of Action Music theory History of lute-family instruments Catholic resistance to Nazi Germany Domestic violence Health effects of electronic cigarettes Slavery in the United States Education in China Operating system History of the Internet American Top 40 Galley Double bass Washington Metro International relations (1814–1919) Chichewa tones Radar in World War II Eastern Bloc Communication of the Trump administration during the COVID-19 pandemic Pinechas (parashah) Andreas Hillgruber Leon Trotsky Workweek and weekend Privacy concerns with social networking services Finnegans Wake Neo-Latin New Orleans Culture of Italy Buenos Aires COBOL History of Speyer Assyria Joseph Conrad British people History of printing Southern Palestine offensive Greek language question Populism Winston Churchill Piracy Luis Cernuda School uniforms by country Singapore George Orwell Protestantism Patronymic KPS 9566 Civil defense siren Legacy of the Roman Empire Finnish language Floating-point arithmetic Vikings Battle of Flers–Courcelette Socialist Federal Republic of Yugoslavia Mircea Eliade Benito Mussolini Canada convoy protest Xenophobia and racism related to the COVID-19 pandemic Titus Andronicus Fish for finance History of HBO Systems of social stratification Comma Danish language Confederate States of America History of education Pound sterling Charles George Gordon Emor Speed limits in the United States by jurisdiction Coordinated Universal Time Iraq French Directory ISO/IEC 2022 List of lingua francas Denmark Ion Antonescu Police brutality by country Foreign policy of the George W. Bush administration Police History of the Jews in Poland Israel–United States relations Ottoman Empire Battle of Jutland White people Education in Ethiopia July Crisis Reliability of Wikipedia Re'eh European debt crisis Archibald Cox Univision History of Paris Finland Sixth Labour Government of New Zealand Moorish architecture Racism History of ESPN on ABC Quebec Houston Stewart Chamberlain Pre-Code Hollywood First 100 days of Donald Trump's presidency Orson Welles BKL singularity History of the Romanian language Jesuits Apartheid History of architecture Child development Multiculturalism EastEnders History of radar Eurasian goshawk History of chemistry Roman conquest of the Iberian Peninsula Ireland List of Bones characters 17 October Revolution Race (human categorization) Roman infantry tactics Vietnamese language Funkabwehr News broadcasting German government response to the COVID-19 pandemic Ancient Egypt List of NCIS characters Netherlands Freedom of speech by country Economic history of Portugal Iran–United States relations Bible Traffic signs by country After Dark (TV programme) Book of Common Prayer Monarchy of Canada Thracian religion Well-being contributing factors Classical Quechua Authoritarian socialism History of the Puerta del Sol Early Netherlandish painting Mikhail Gorbachev Languages of the United States Hellenistic period Braille Linux kernel Neanderthal Chinese grammar Speaking clock The Price Is Right Madrasa 1989 Tiananmen Square protests and massacre Pornography Conditional preservation of the saints Suez Crisis Child labour Chavacano Chiapas Kokoda Track campaign Douglas Haig, 1st Earl Haig Age of Enlightenment New Testament Smile (The Beach Boys album) Donald Trump 2016 presidential campaign Vayeira KOKH-TV Telehealth History of United States foreign policy John F. Kennedy Islamic veiling practices by country Crossword African military systems before 1800 History of Oregon State Beavers football Zero-point energy Cultural impact of the Beatles Switzerland Global Positioning System Steppe eagle Quotation marks in English Speech synthesis BBC Taiwan Augmentative and alternative communication List of Regular Show characters Dutch grammar Thailand Gender neutrality in languages with gendered third-person pronouns Spanish profanity Criticism of the Quran Exponentiation Russia under Vladimir Putin History of gunpowder Iloilo City Characters of Casualty Lockheed Martin F-35 Lightning II Canadian procurement Alfred Waterhouse List of Google April Fools' Day jokes Aramaic Soviet–Afghan War Steam locomotive Human cannibalism Nigeria History of Belgium Spanish and Portuguese Jews Special relativity Catholic Church History of Scotland Sexism Clock position Moby-Dick Serbia in the Middle Ages Edward Aveling Yiddish Trump administration family separation policy Austronesian peoples Silviculture Battle of Albert (1916) History of the foreign relations of the United Kingdom Sentence spacing Nazism Christchurch Transport Board Swastika Official state car Operation Badr (1973) Cavalry Moldova Vladimir Putin Quran Operation Market Garden Special Relationship Electricity meter Landing Craft Assault Poetry Hawaii KWTV-DT History of Zakynthos Russian interference in the 2016 United States elections American cuisine Hillary Clinton 2008 presidential primary campaign Ligature (writing) Health care systems by country Virginia Economic impact of the COVID-19 pandemic Esperanto grammar Oyster card Anne de Montmorency, 1st Duke of Montmorency Sea shanty English literature Military band William Christian Bullitt Jr. Riau Islands History of cartography Mount Everest Union Jack Radiation effects from the Fukushima Daiichi nuclear disaster Egypt Windows 10 History of writing Amelia Earhart Joseph Lister History of the Kingdom of Italy (1861–1946) WKNR Robert F. Kennedy List of The Hitchhiker's Guide to the Galaxy characters Shemot (parashah) Apollo 11 Elvis Presley Ottoman architecture List of Sharpe series characters George Mallory 33rd Alabama Infantry Regiment Sinking of the Titanic History of Major League Baseball on NBC Criticism of Amazon False or misleading statements by Donald Trump History of film Acorn Electron Trump–Ukraine scandal Taiwanese indigenous peoples Mishpatim Migrant worker Baby boomers Homelessness Jazz Brazil Safavid Iran Electrical telegraphy in the United Kingdom Irish language Command-line interface Breastfeeding Han unification World War I memorials Ancient Greek phonology History of Beijing Vietnam War Italian diaspora Papua (province) Bulgarian language Hanfu History of autism Willys MB History of Lithuania Sámi peoples Japanese grammar Nonverbal communication Political positions of John McCain Fidel Castro List of unmade Doctor Who serials and films Modern paganism Pet Sounds History of the British 8th Division during the First World War Responsibility for the Holocaust Sport in the United Kingdom History of tattooing Malaysia Airlines Flight 370 Detribalization Julian calendar Civil rights movement Turkey British Army during the First World War Media portrayal of the Russo-Ukrainian War Elevator History of CBS Abbreviation Sentence spacing in language and style guides Decimal separator Spanish Civil War Noach Budapest Responses to the COVID-19 pandemic in March 2020 AI Mark VIII radar Neobyzantine Octoechos Fédon's rebellion Warren G. Harding Artillery Republic of Ireland Vietnam Concorde Forests Commission Victoria History of South Africa Freedom of religion in Europe by country American imperialism Cumans Year Sinai and Palestine campaign Beijing History of the metric system Nintendo Switch 2014 Scottish independence referendum Welsh language Art of ancient Egypt Archaeoastronomy Zhou Enlai Spanish Empire C syntax Adolescence History of the New York City Subway Film noir History of Missouri Julius Nyerere 1922 regnal list of Ethiopia Operation Toan Thang III Santa Cruz Operation Blackface English trust law Human rights in the United States SAT Alexander Zinoviev Metres of Roman comedy German orthography Western world Nepal Red Orchestra (espionage) Red-tailed hawk Characters of the Street Fighter series Discworld (world) Methodism MTS system architecture Disco Rhetoric Russia Battle of Wagram Mercury (planet) Chronology of the 2009 Honduran constitutional crisis Face masks during the COVID-19 pandemic Scientology Napoleon III Earth History of medicine Rattanakosin Kingdom (1782–1932) Beta distribution Hoodoo (spirituality) Sierra Leone Doctor of Philosophy Finnish grammar Reconstruction era Hillsborough disaster List of Judge Dredd characters Bathala Hangul Jews Cornish language Age of Discovery Texas Jeremy Corbyn Augustin-Jean Fresnel B movie Gaza War (2008–2009) Philosophy of Søren Kierkegaard Political abuse of psychiatry in the Soviet Union Gulf War Julian day History of the War in Afghanistan (2001–2021) Architecture of Finland Reformation Espoo September 11 attacks Yemen Incarceration in the United States Traditional Chinese medicine Tang dynasty Official bilingualism in Canada History of video games California Bande dessinée Korean language Demographic history of Macedonia Citizen Kane Ural owl Francisco Xavier de Mendonça Furtado Uyghur genocide List of characters in the Breaking Bad franchise John McCain 2008 presidential campaign GPS signals Date and time notation in Canada Police corruption Plame affair Mueller report Zimbabwe Vocative case Che Guevara History of propaganda Peruvian political crisis (2017–present) Joachim von Ribbentrop Subjunctive mood African-American history Oddworld Inhabitants Characters of Shakespear's Plays United States Postal Service Argentina Anti-Americanism Guatemalan Civil War Internment of Japanese Americans List of book-burning incidents WFAN (AM) WikiLeaks Astroworld Festival crowd crush US FWS Charles H. Gilbert History of education in the United States China–United States relations Anti-Comintern Pact Fighter aircraft Constitution of the United Kingdom Terminology of the British Isles Late modern period Kazakhstan List of built-in macOS apps Responsibility for the Russo-Georgian War Prime time History of theatre Educational technology Galicia (Spain) Town LGBT history History of geodesy Tuberculosis management Stalemate in Southern Palestine Smolensk air disaster Rape statistics Berbers Aztecs Farouk of Egypt Polish language British Empire Historiography of the British Empire Bangladesh English numerals Sign language Storey Hungary Weekend effect Linguistics in science fiction Logic Characters of the Metal Gear series Japanese war crimes Supercapacitor Spain Bondelswarts Rebellion Bias against left-handed people European Union Hipparchus Bulgarian Turks Steam (service) White Africans of European ancestry History of Israel History of the United States government Massachusett language Sgt. Pepper's Lonely Hearts Club Band Human nutrition Fox News Robot British Columbia South African constitutional litigation Militia 2016 United Kingdom European Union membership referendum