AM meaning in Time ?

Answer: What is Ante Meridiem mean?

The 12-hour clock is a time convention in which the 24 hours of the day are divided into two periods: a.m. (from Latin ante meridiem, translating to "before midday") and p.m. (from Latin post meridiem, translating to "after midday"). Each period consists of 12 hours numbered: 12 (acting as 0), 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11.

The daily cycle starts at 12 midnight (usually indicated as 12:00 a.m.), runs through 12 noon (usually indicated as 12:00 p.m.), and continues until just before midnight at the end of the day. The 12-hour clock was developed from the second millennium BC and reached its modern form in the 16th century AD.

The 12-hour time convention is common in several English-speaking nations and former British colonies, as well as a few other countries. It is an example of a duodecimal system.

reference

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Age Major	Academic & Science
Applied Mathematics	Academic & Science
Addressing Mode	Academic & Science
Aerobic Metabolism	Academic & Science
Adjoint Matrix	Academic & Science
Admitance Matrix	Academic & Science
Anno Mundi (year of the world)	Academic & Science
Anti Meridian	Academic & Science
Air Mass	Academic & Science
attometre	Academic & Science
Account Monitoring	Accounts and Finance
Active Minds	Associations & Organizations
Assistant Manager	Banking
American Greetings Corporation	Business
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Americium	Chemistry
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Americana Music	Community
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All Music	Community
Ave Maria	Community
Attitude Media	Community
Assignment Message	Computer and Networking
Automatic Margins	Computing
Armenia (TLD)	Computing
Armenia	Country Names
AlternateMoney	Cryptocurrency
Aston Martin Cognizant Fan Token	Cryptocurrency
Artium Magister (master of Arts)	Educational Degree
Analog Modeling	Electronics
Ante Meridiem (before Noon)	Electronics
Antemeridian Meaning	General
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aria Montgomery	General
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After Morning	General
Additive Manufactoring	General
Amplitude Modulated	General
Amateur Much	General
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After Midnight	General
Anti Meridiem	General
Ahh Morning	General
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Activity Model	General
Amber	General
Ante Meridien	General
About a Million	General
Away Message	General
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Minelayer (Auxiliary, Minelayer)	General
Annie's Man	General
After Mention	General
Air Market	General
Awakenings Mission	General
Addressograph Multigraph	General
Award of Merit	General
Armand Marseille	General
Antony Milton	General
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Asian Male	Governmental
Attempted Murder	Governmental
Allowcation Map	Governmental
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American Machine and Foundry	Governmental
Access Method	Information Technology
Active Matrix	Information Technology
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Allied Mastercomputer	Information Technology
Amplitude Modulation	Information Technology
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Arithmetic Mean	Maths
Attometer	Measurement Unit
In the Morning, before Noon	Medical
Adult Male	Medical
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Amnesia	Medical
Before Noon	Medical
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Acrosomal Matrix	Medical
actomycin	Medical
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Adductor Magnus	Medical
Adhesion Molecule	Medical
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Age-Matched	Medical
Alveolar Macrophage	Medical
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amikacin	Medical
amlodipine	Medical
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amoxicillin	Medical
ampicillin	Medical
amygdala	Medical
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anteromedial	Medical
antimalarial	Medical
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apomorphine	Medical
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Assembly Member (Wales)	Medical
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Alternative Medium	Medical
Antagonistic Message	Messaging
Anytime Maybe	Messaging
Amunition	Military and Defence
Alert Message	Military and Defence
Acknowledgment Message	Military and Defence
Air Mobile	Military and Defence
Asset Management	Military and Defence
Antes del Mediodía	News & Entertainment
American Morning	News & Entertainment
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Arkansas and Missouri Railroad	Regional
Amharic	Regional
Arkansas and Missouri Railroad Company	Regional
Axia Metalliki (value in metal)	Regional
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Application Manager	Softwares
Automated Mathematician	Softwares
Anti-module	Softwares
Aroundme	Softwares
Actuator Mechanism	Space Science
Administration and Management Operations Directorate	Space Science
Alpha Meter	Space Science
Ammeter	Space Science
Antenna Management	Space Science
Atletico Madrid	Sports
Attacking Midfielder	Sports & Games
Additive Manufacturing	Technology
Advance Mobile	Telecommunication
Appliction Manager	Telecommunication
Ante Meridian	Time
Ante Meridiem	Time
Aeroméxico	Transport & Travel