AM PM is a time convention distinguishing between the two 12-hour daily periods.
The AM PM system is commonly used in English-speaking countries to indicate morning and afternoon/evening times.
AM stands for the period from midnight (12:00 AM) to just before noon (11:59 AM). It represents the morning hours.
PM stands for the time period from noon (12:00 PM) to just before midnight (11:59 PM), representing the afternoon and evening hours.
The full form of AM is "ante meridiem," and the full form of PM is "post meridiem." These terms are derived from Latin and have the following meanings:
The AM and PM designations are used to differentiate between the two 12-hour periods in a day. They are commonly used in English-speaking countries to indicate morning and afternoon/evening times.
To convert a time from AM PM format to a 24-hour clock format:
| Time AM | Conversion to 24 hour clock |
| 2:30 AM | 2:30 |
| 7:45 AM | 7:45 |
| 9:10 AM | 9:10 |
| 10:15 AM | 10:15 |
| 11:55 AM | 11:55 |
| Time PM | Conversion to 24-hour clock |
| 1:30 PM | 13:30 |
| 4:45 PM | 16:45 |
| 6:10 PM | 18:10 |
| 8:15 PM | 20:15 |
| 11:30 PM | 23:30 |
To convert a time from a 24-hour clock format to an AM PM format:
24 hour clock time now | AM-PM clock time now |
| 24-hour clock | Conversion to AM-PM time |
| 8:00 | 8:00 AM |
| 0:15 | 12:15 AM |
| 9:30 | 9:30 AM |
| 18:45 | 6:45 PM |
| 23:10 | 11:10 PM |
Tip: Discover the 24 hour clock converter, to help you with the tricky time calculations.
AMrefers to the morning hours (midnight to just before noon), while PM refers to the afternoon and evening hours (noon to just before midnight).
AM stands for "ante meridiem" (before midday), while PM stands for "post meridiem" (after midday).
The 24-hour clock does not differentiate between AM and PM; it uses a continuous counting system from 0 to 23.
The two 12-hour periods are AM (morning hours) and PM (afternoon/evening hours). AM represents the time from midnight to just before noon, while PM represents the time from noon to just before midnight.
The 12-hour clock format is commonly used in English-speaking locations across the globe, including the United States, Canada, the United Kingdom, Australia, and many others. It is widely used in everyday life, including personal schedules, transportation timetables, business hours, and social events.
The 12-hour clock is a timekeeping system that divides a day into two 12-hour periods. It uses AM (ante meridiem) for the morning hours and PM (post meridiem) for the afternoon and evening hours. The clock cycles from 1 to 12 twice a day, uniquely identifying each hour within its respective period.
Referred to as military time or the 24-hour time format, it is a timekeeping system that expresses time using a 24-hour cycle. It eliminates the need for AM and PM distinctions by representing hours from 0 to 23. For example, 1:00 PM is represented as 13:00 in the 24-hour clock.
When we refer to 11:59 PM, we mean one minute before midnight, which is the end of the day. It is still considered part of the PM period.
PM refers to the afternoon and evening hours. It is considered part of the nighttime period rather than the morning. AM represents the morning period.
To convert AM PM time to the 24-hour clock format:
Noon is 12:00 PM, representing the midday point when the sun is at its highest position in the sky.
Yes, 12 AM represents midnight, the start of a new day.
12:30 AM in the 24-hour format is represented as 00:30.
From 8AM to 4PM you have 8 hours.
There are two ways to calculate this hours difference:Using AM-PM time format:
Alternative answer using 24-hour time format:
Tip: 8 hours is a working day, from 8 am to 4 pm. However, the typical workday in a factory is 7.30 am to 4 pm, with an additional half-hour for an unpaid 30-minute lunch break.
There are 9 hours between 8AM and 5PM?
Tip: Use our hours calculator to find the time difference.
The 12-hour clock format has ancient origins and has evolved over time. Its establishment is attributed to various civilizations and cultures throughout history, including the Babylonians, Egyptians, and Romans. The modern usage of the 12-hour clock format developed over centuries of timekeeping practices.
The evolution of timekeeping spans thousands of years, starting with early civilizations observing the sun's and stars' motion. Sundials, water clocks, and mechanical clocks gradually emerged to measure time more accurately. The adoption of standardized time systems and the development of digital clocks further refined timekeeping practices.
AM and PM are widely used in daily life for scheduling and time management. They help distinguish between morning and afternoon/evening appointments, meetings, events, and other activities. They are used in various contexts, such as work schedules, school timetables, transportation schedules, and personal calendars.